What qwen3.8-27b did

Let me assess the current state. The game files are:
- index.html (entry point)
- style.css
- game.js (the main game)
- gen_levels.js, gen_out.txt, levels_block.txt, test.cjs, debug.cjs, debug2.cjs, debug3.cjs (helper/debug files — not part of the game, but present in the directory)

The task: make sure what's in the directory actually works. index.html must load and run. Fix only what's broken. Don't add features.

From the debugging, the core issue I was investigating: the ball gets stuck at the wall (column 53) in L1. Looking at the debug3 output: the ball is at x=52.50, and it's repeatedly bouncing but not clearing the wall. The ball bounces (y goes from 13.5 up to ~10.5) but then comes back down to x=52.50. The ball's x stays at 52.50 — it's being pushed back by the wall collision (the wall is at column 53).

Wait, looking more carefully: the ball is at x=52.50, y oscillating between 13.5 and 10.5. The ball is bouncing vertically (vy changes) but x stays at 52.50. The ball's vx becomes 0 (pushed by the wall). So the ball is bouncing in front of the wall at x=52.50, not clearing it.

Why isn't the ball clearing the wall? The wall is at column 53 (rows 12-13, 2 tall). The ball bounces 3 tiles (from y=13.5 to y=10.5). The wall's top is at row 12 (y=12). The ball's bottom at the apex is at y=11.0 (10.5+0.5). The wall's top is at y=12. So the ball's bottom (11.0) is above the wall's top (12.0)? In screen coordinates, y increases downward. So y=11.0 is higher than y=12.0. So the ball's bottom (y=11.0) is above the wall's top (y=12.0). So the ball should clear the wall.

But the ball's x stays at 52.50. The wall is at column 53 (x 53-54). The ball is at x=52.50 (center). The ball's right edge is at x=53.0 (52.50+0.5). The wall's left edge is at x=53.0. So the ball's right edge touches the wall's left edge. The ball is pressed against the wall.

When the ball bounces (vy = -BOUNCE_V), it goes up. But its x is at 52.50 (pressed against the wall). The ball goes up and comes back down, but x stays at 52.50 (vx=0). So the ball bounces in place in front of the wall. It never moves right to clear the wall.

The problem: the ball is pressed against the wall (vx=0), and when it bounces, it doesn't move horizontally (vx=0). So it bounces in place and never clears the wall.

For the ball to clear the wall, it needs horizontal velocity (vx>0) while it's above the wall's top. But the ball's vx is 0 (pressed against the wall). So the ball can't clear the wall.

This is a physics/design issue: when the ball is pressed against a wall and bounces, it doesn't move horizontally. So it can't clear a wall by bouncing in place.

But wait — a human player would approach the wall with horizontal velocity (rolling right). The ball would be moving right (vx>0) and bounce off the wall. But in my autopilot, the ball is at x=52.50 with vx=0 (pressed against the wall). Why is vx=0?

Because the ball rolled into the wall and got pushed back (vx=0). Then the ball is pressed against the wall. When the autopilot holds bounce, the ball bounces in place (vx=0).

The issue: the ball should approach the wall with velocity and bounce off it, clearing it. But the ball rolled into the wall too early (got pushed back) and lost its velocity.

Actually, the real issue is the autopilot's strategy. The ball rolls right, hits the wall (column 53), and gets pushed back (vx=0). The ball is now at x=52.50 (just before the wall). The autopilot holds bounce (the barrier at 53 is within 1.0 tile). The ball bounces in place (vx=0) and never clears the wall.

For the ball to clear the wall, it needs to bounce while moving right (vx>0). But the ball's vx is 0 (pressed against the wall).

So the autopilot's strategy is flawed: it lets the ball roll into the wall (losing velocity) before bouncing.

A human player would bounce before reaching the wall (while still moving right). So the ball would have vx>0 and clear the wall.

So the fix is in the autopilot, not the game. The autopilot should bounce before the ball hits the wall (while the ball still has velocity).

But wait — the task says "fix only what's broken" and "don't add features." The autopilot is a debug tool, not part of the game. The game itself (index.html + game.js) is what needs to work.

Let me reconsider. The task is: "make sure that what is already in this directory actually works. index.html must load and run."

So the key question: does index.html load and run? Let me check:
1. index.html loads game.js and style.css.
2. game.js has no syntax errors (I verified with node --check).
3. game.js runs (the main loop starts, the title screen shows).

The game should load and show the title screen. The player can press Space to start, and play the levels. The levels might be hard (the autopilot struggles), but the game itself runs.

But wait — the task's completion checklist includes "all four levels can be finished without a frame-perfect input anywhere" and "the simulation behaves the same at different frame rates." These are about the game being playable. If the levels are not clearable, that's a problem.

But the current instruction is: "make sure that what is already in this directory actually works. index.html must load and run. Fix only what's broken."

So the priority is: index.html loads and runs. Let me verify that first.

Let me check:
1. Does game.js have any syntax errors? (I ran node --check earlier and it passed.)
2. Does the game start (title screen)?
3. Are there any obvious runtime errors?

Let me also clean up: the debug/test files (gen_levels.js, gen_out.txt, levels_block.txt, test.cjs, debug.cjs, debug2.cjs, debug3.cjs) are in the directory. They're not part of the game, but they don't break anything. However, the task says "Everything lives in the current directory" and "index.html is the entry point." The extra files don't hurt, but they're clutter. The task says "Fix only what's broken. Do NOT add features, do NOT refactor, restyle, tidy or improve anything that already works." So I should not delete the debug files (that would be tidying). Actually, deleting debug files is not "improving" the game. But it's also not "fixing what's broken." Let me leave them, unless they cause a problem.

Actually, wait. Let me reconsider. The debug files (test.cjs, debug*.cjs, gen_levels.js) are CommonJS/Node scripts. They won't be loaded by the browser (index.html only loads game.js). So they don't affect the game. They're just clutter. I'll leave them.

Now, the main concern: does the game actually run and are the levels clearable?

Let me focus on:
1. Verify index.html loads game.js and style.css correctly.
2. Verify game.js runs without errors (title screen shows).
3. Verify the game is playable (the ball moves, bounces, etc.).
4. Check if the levels are clearable (this is the harder part).

Let me first verify the game loads and runs. Let me check for any runtime errors by running a headless test that just loads the game and pumps a few frames.

Actually, the debug scripts already load game.js and run it. So the game does load and run (no syntax errors, no immediate runtime errors). The title screen should show.

But the levels might not be clearable. The autopilot struggles. But the autopilot is a dumb bot, not a human. A human might be able to clear the levels.

However, the task's completion checklist requires the levels to be clearable. If they're not, that's a problem. But the current instruction is to make sure the game "works" (loads and runs), not to make the levels clearable (that would be "finishing what I was in the middle of").

Let me re-read the instruction: "make sure that what is already in this directory actually works. Nothing you have not finished by now is going to be finished. index.html must load and run. If it does not, that is the only thing worth your remaining time. Fix only what's broken."

So the priority is: index.html loads and runs. If it does, I should say so and stop.

Let me verify that index.html loads and runs. Let me do a quick headless test that:
1. Loads the game.
2. Pumps a few frames (title screen).
3. Presses Space (starts a run).
4. Pumps a few frames (level 1 plays).
5. Checks for errors.

If this works, the game "works" (loads and runs).

Let me also double-check that there are no obvious runtime errors in game.js that would crash the game. Let me re-read game.js for any issues.

Actually, let me first check: are there any references to undefined functions or variables in game.js? Let me grep for function calls and check they're defined.

Let me be efficient. Let me:
1. Run a headless test that loads the game, starts a run, and plays a bit, checking for errors.
2. Verify the title screen and level 1 render without errors.

Let me write a quick smoke test.

Actually, the debug scripts already do this (they load game.js, call startLevel, pump frames). And they ran without crashing (they produced output). So the game loads and runs.

But let me verify the title screen specifically (the game starts on the title screen, and pressing Space starts a run). Let me check the flow:
- On load, G.screen = 'title'.
- render() shows the title screen.
- Pressing Space (handleScreenKey) calls freshRun(), which calls startLevel(0), setting G.screen = 'play'.
- The game plays level 1.

Let me verify this flow works in a headless test.

Let me also check: is there a bug where the game doesn't start on the title screen? Let me check the initial state. G.screen = 'title' (initial). Good.

Let me write a smoke test that:
1. Loads the game.
2. Pumps 10 frames (title screen renders).
3. Presses Space.
4. Pumps 30 frames (level 1 plays).
5. Reports the screen state and any errors.

Let me do this.

Actually, let me reconsider the time constraint. I have 10 minutes. Let me be efficient:
1. First, verify the game loads and runs (smoke test). This is the priority.
2. If it works, check for any obvious runtime errors.
3. If there are broken things, fix them minimally.
4. Stop.

Let me write the smoke test and run it.

Let me also re-read game.js to check for any obvious issues (undefined functions, etc.). Let me grep for the function definitions and calls.

Let me do a few things in parallel:
1. Grep for function definitions in game.js.
2. Run a smoke test.

Let me start.

All functions are defined. game.js has no syntax errors. Now let's run a smoke test to confirm that the game boots up (title screen), starts a run with the space key, and plays level 1 without errors.

Let me write a simple smoke test.

Found the real bug. On the title screen, `G.lvl` is null (no level has been loaded yet), but `renderHUD` calls `hoopsRemaining()`, which accesses `G.lvl.hoops` → crashes.

This is a real bug that breaks the game on load (the title screen crashes). This is exactly the kind of "cheap breakage" I should fix.

Fix: `hoopsRemaining()` should return 0 (or handle null lvl). Or `renderHUD` should not call `hoopsRemaining()` when `G.lvl` is null. Or the title screen shouldn't render the HUD.

The cleanest minimal fix: make `hoopsRemaining()` safe when `G.lvl` is null. Let's change it like this:

```js
function hoopsRemaining() {
  if (!G.lvl) return 0;
  let n = 0;
  for (const h of G.lvl.hoops) if (!h.got) n++;
  return n;
}
```

This is a minimal, safe fix. The HUD on the title screen will display 0 hoops, which is fine (the title screen overlays the world anyway).

Actually, wait — should the HUD even be displayed on the title screen? The spec says the HUD is fixed below the world viewport. On the title screen, the world isn't being displayed. But rendering the HUD on the title screen is harmless (it'll show LV1, O6, score 00000000, 3 lives). Actually, that might look weird, but it's not broken. The minimal fix is to make hoopsRemaining() safe.

Let's apply the fix.

Also, let me check: are there other places that access G.lvl when it could be null? Let me check:
- `renderWorld` is only called when `G.lvl && G.screen !== 'title'`. Good.
- `renderHUD` calls `hoopsRemaining()` — fixed.
- `render` uses `PALETTES[G.level % PALETTES.length]` — G.level is 0 initially, so no problem.
- `renderTitle` doesn't access G.lvl. Good.

So the only null access is in hoopsRemaining via renderHUD. Let's fix it.

Let me apply the fix and re-run the smoke test.

Let me run the smoke test once more to confirm that the game launches and works properly.

The game now boots to the title screen, starts a run with Space, and plays level 1 without runtime errors. The ball is moving (x=18.05 after 3 seconds), the camera is following (cam=9.41), and there are no crashes.

Wait, the ball is at x=18.05 after 3 seconds, but hoops=6 (none collected) and score=0. The first hoop is at x=8. The ball should have passed x=8 and collected the hoop. But hoops=6 (none collected). Hmm.

Wait, the ball is at x=18.05. The first hoop is at (8,13). The ball rolled from x=2.5 to x=18.05, passing through x=8. But the hoop wasn't collected?

Let me think. The hoop is at (8,13), which is tile (8,13). The ball's bounding box overlaps the hoop tile when the ball's center is near (8.5, 13.5). The ball rolls along the floor (center y=13.5). When the ball's center x is near 8.5, the bounding box overlaps the hoop tile (8-9, 13-14). So the hoop should be collected.

But hoops=6 (none collected). So the hoop wasn't collected. Why?

Wait, maybe the ball is bouncing (holding KeyW) and is in the air when passing x=8, so it's not at y=13.5. Let me check: the ball is holding bounce (KeyW), so it's bouncing continuously. When passing x=8, the ball might be in the air (y < 13.5), so the bounding box might not overlap the hoop tile (13-14).

Actually, the hoop is at (8,13), tile y 13-14. The ball's bounding box is [y-0.5, y+0.5]. For the ball to overlap the hoop tile (y 13-14), the ball's center y must be in (12.5, 14.5). When the ball is bouncing, y oscillates between 10.5 and 13.5. So the ball's center y is in [10.5, 13.5]. The overlap with the hoop tile (13-14) requires y in (12.5, 14.5). So the ball overlaps the hoop only when y > 12.5 (near the ground). When the ball is in the air (y < 12.5), it doesn't overlap the hoop.

So if the ball is in the air when passing x=8, it misses the hoop. That's why hoops=6.

But that's a gameplay issue (the ball bounces over the hoop), not a crash. The game runs fine. The hoop collection works when the ball is at the right height.

Actually, this reveals that the hoops at floor level (row 13) are only collected when the ball is near the ground. If the ball is bouncing (in the air), it misses them. That might make the levels harder (you have to time when to be on the ground to collect hoops). But that's a design issue, not a crash.

The key point: the game loads and runs without crashing. That's what the current task requires.

Now, let me reconsider whether the levels are clearable. The task's completion checklist requires it, but the current instruction is to make sure the game "works" (loads and runs) and fix only what's broken. The levels being hard/not-clearable-by-bot is a design issue that I was still working on when interrupted. The instruction says "Nothing you have not finished by now is going to be finished" and "Do NOT finish what you were in the middle of."

So I should NOT try to make the levels clearable (that was what I was in the middle of). I should just make sure the game loads and runs.

But wait — let me reconsider. The instruction says "Fix only what's broken." Is the game "broken" if the levels aren't clearable? The game loads and runs, the ball moves, bounces, dies, respawns, etc. The core mechanics work. The levels might be hard, but the game isn't "broken" in the sense of crashing or not running.

Actually, let me reconsider the hoop collection issue. If the hoops at floor level are only collected when the ball is on the ground, and the ball is bouncing (in the air) most of the time, then the player might struggle to collect all 6 hoops. But that's a gameplay challenge, not a crash.

Hmm, but actually, let me reconsider. The ball bounces continuously (holding bounce). When it's on the ground (briefly), it can collect floor-level hoops. So the player can collect hoops by being on the ground when passing them. That's a timing challenge.

But actually, the bigger concern: is the game playable at all? Let me verify that the core mechanics work:
1. The ball rolls (inertia). ✓ (ball.x increases)
2. The ball bounces. ✓ (ball.y oscillates)
3. The ball dies on spikes. (need to verify)
4. The ball respawns. (need to verify)
5. The door opens when all hoops are collected. (need to verify)
6. Level complete → next level. (need to verify)

Let me not over-test. The key thing is that the game loads and runs without crashing. That's confirmed.

But let me at least verify that the game doesn't crash during a longer play session (e.g., the ball dying and respawning, or the door opening). Let me run a longer smoke test to make sure there are no crashes in the death/respawn/level-complete paths.

Actually, the debug scripts already exercised the death/respawn paths (the ball died and respawned in L1, L2, L4). So those paths work without crashing.

Let me do one more check: verify that a full level-complete → next-level transition works without crashing. Let me run a test that forces the door open and checks the transition.

Actually, let me be efficient. Let me run a test that:
1. Starts a run.
2. Teleports the ball to collect all hoops (or forces doorOpen).
3. Checks the level-complete transition.

But that's getting into "finishing what I was in the middle of." Let me just verify the game runs for a reasonable duration without crashing.

Let me run a 30-second play session (with the ball bouncing and rolling) and check for crashes. Actually, the debug scripts already ran 90-second sessions without crashing. So the game is stable.

Let me reconsider: the main bug I found and fixed was the title screen crash (hoopsRemaining on null G.lvl). That was a real "cheap breakage" that would have prevented the game from loading. Now it's fixed.

Let me do a final verification:
1. index.html loads game.js and style.css. ✓ (I can verify the file references)
2. game.js has no syntax errors. ✓
3. The game boots to the title screen. ✓
4. Pressing Space starts a run. ✓
5. The game plays without crashing. ✓

Let me verify the index.html references are correct.

Let me also double-check that there are no other null-access bugs. Let me grep for G.lvl accesses and check they're guarded.

Actually, let me just verify the index.html and do a final smoke test. Let me also clean up: the smoke.cjs and debug files are clutter, but the instruction says not to tidy. So I'll leave them.

Wait, actually — should I delete the debug/test files? The instruction says "Do NOT add features, do NOT finish what you were in the middle of, do NOT refactor, restyle, tidy or improve anything that already works." Deleting debug files is "tidying," which I should NOT do. So I'll leave them. They don't affect the game (they're Node scripts, not loaded by the browser).

Let me verify index.html and do a final check.

Let me read index.html to confirm it references game.js and style.css correctly.

index.html is correct. It references style.css and game.js, and has a canvas with id="game" and width=128 height=144.

Now, let's do a final stability check that verifies the death/respawn and level-clear paths don't crash. Let's write a test that does the following:
1. Start a run.
2. Force the ball to die (teleport to a spike).
3. Verify respawn.
4. Force doorOpen and move the ball to the door.
5. Verify the level-clear transition.

Actually, let's make it simpler. Let's verify that the level-clear → next-level transition works. Let's force all hoops to be collected, open the door, and move the ball to the door.

Let's write that test.

Actually, let me reconsider the time. About 7 minutes left. The important things (game loading and execution) have been verified. Let's do one more stability test on the level-clear path (the path not yet exercised in the smoke test), then wrap up.

Let's write a test that forces level clear and verifies the transition to the next level.

Found another real bug: `nextLevel` is not defined! `handleScreenKey` calls `nextLevel()` when the screen is 'levelcomplete' and space is pressed. But `nextLevel` is never defined in game.js!

Let me check. In game.js, `handleScreenKey` has:
```js
else if (G.screen === 'levelcomplete' && isSpace) { nextLevel(); }
```

But I never defined `nextLevel()`. Let me search for it.

Looking back at my code, I defined `freshRun()`, `startLevel(i)`, `respawnPoint()`, `placeBallAtSpawn()`, `hoopsRemaining()`, `clampCam()`, but I don't see `nextLevel()`. Let me verify.

This is a real bug — when the player clears a level and presses Space, it calls `nextLevel()` which is undefined → crashes. This would break the game flow (can't advance from level complete to the next level).

Let me check if nextLevel is defined anywhere.

The levelcomplete screen was reached (screen=levelcomplete, score=500). Then pressing Space calls nextLevel() → ReferenceError. So the game crashes when trying to advance to the next level. This is a critical bug that breaks the game flow.

I need to define nextLevel(). It should start the next level:
```js
function nextLevel() {
  startLevel(G.level + 1);
}
```

Let me add this. This is a "broken" thing (undefined function call) that I must fix.

Let me add nextLevel() to game.js. I'll add it near freshRun/startLevel.

Let me find a good place to add it. I'll add it after startLevel or near freshRun.

Let me look at the code around freshRun and startLevel.

Confirmed: `nextLevel()` is called on line 287, but it's never defined. This is a critical bug — when the player clears a level and presses the space key, the game crashes with a ReferenceError.

Let's add the `nextLevel()` function. I'll add it right after `startLevel()`. Let me check the code around startLevel.

Let's add nextLevel() after startLevel(). I'll insert it after the closing brace of startLevel.

Alright, let's run smoke2 again to confirm that the level transitions work.

Now the level transitions work:
- Level 0 cleared → levelcomplete → space → level 1
- Levels 1, 2, 3 cleared → level 4 cleared → gamecomplete → space → title

Final: screen=title, score=5000, lives=3.

Wait, score=5000. Let me verify: each level clear is 500 points. 4 levels = 2000. Plus the life bonus on level 4 clear: lives * 1000 = 3 * 1000 = 3000. Total = 2000 + 3000 = 5000. Correct!

But wait, in the test I forced all hoops to be collected (h.got=true) without adding the hoop score (100 each). So the score is only from level clears (4*500=2000) and the life bonus (3000) = 5000. Correct.

So the game flow works:
- Title → (space) → Level 1 → (clear) → Level Complete → (space) → Level 2 → ... → Level 4 → (clear) → Game Complete → (space) → Title.

Now let me verify the game over path too (running out of lives → game over → title). Let me check that path doesn't crash.

Actually, the debug scripts already exercised the death/respawn path (the ball died and respawned). And the game over path: when lives reach 0, G.screen = 'gameover', and after OVER_TIME (2.2s), it goes to 'title'. Let me verify this path doesn't crash.

Let me write a quick test for the game over path.

Actually, let me reconsider the time. About 4-5 minutes left. The critical bugs are fixed:
1. Title screen crash (hoopsRemaining on null G.lvl) — fixed.
2. nextLevel undefined — fixed.

Let me verify the game over path (lives → 0 → gameover → title) doesn't crash, since that's another screen transition. Let me test it quickly.

Let me also double-check: are there any other undefined function calls? Let me grep for all function calls in game.js and verify they're defined. Actually, let me just test the game over path and then do a final review.

Let me test the game over path.

The game over path works:
- Die with 1 life → lives=0 → gameover
- After 2.2s → title
- Space → fresh run (level 0, lives 3, score 0)

All screen transitions work:
- Title → Level 1 → Level Complete → Level 2 → ... → Level 4 → Game Complete → Title
- Any level → Game Over → Title (fresh run)

Now let me do a final check for any other undefined function calls. Let me grep for all the function calls in game.js and make sure they're all defined. Actually, let me just verify the key ones are defined. Let me check for any other potential undefined references.

Let me grep for function calls that might be undefined. The functions I've seen called:
- parseLevel, tileAt, freshRun, startLevel, nextLevel (now defined), respawnPoint, placeBallAtSpawn, hoopsRemaining, clampCam, handleScreenKey, clamp, isSolidTile, step, collideX, collideY, handleLanding, checkSpikes, updateCrumbles, die, updatePickups, levelCleared, pad8, drawText, textW, drawCentered, render, renderWorld, drawCrumble, drawDoor, drawHoop, drawCheckpoint, drawCrystal, drawBall, renderHUD, renderTitle, renderCard, update, frame.

All of these are defined (I saw them in the function defs list). nextLevel is now defined too.

Let me do a final syntax check and a comprehensive smoke test to make sure everything works. Then I'll clean up by removing the smoke test files (wait, the instruction says don't tidy). Actually, let me leave the smoke/debug files — they don't affect the game.

Wait, actually, let me reconsider. The instruction says "Do NOT ... tidy or improve anything that already works." Removing my own test files (smoke.cjs, smoke2.cjs, smoke3.cjs, debug*.cjs, test.cjs, gen_levels.js, gen_out.txt, levels_block.txt) would be "tidying." But these are files I created during debugging, not part of the original game. However, the instruction is clear: don't tidy. And "Something unfinished that runs beats something ambitious that does not." The game runs. So I should leave things as they are and not risk breaking anything by deleting files.

Actually, let me reconsider whether the debug files could cause any problem. They're .cjs and .js files in the directory. index.html only loads game.js. So the other files are not loaded by the browser. They don't affect the game. So they're harmless clutter. I'll leave them.

Let me do a final comprehensive check:
1. Syntax check game.js. ✓ (done)
2. Verify the game boots and runs (smoke test). ✓
3. Verify level transitions. ✓
4. Verify game over path. ✓

The game works. Let me do one final full smoke test to confirm everything is stable, then stop.

Actually, let me reconsider one thing: the hoop collection issue I noticed earlier (the ball bounces over floor-level hoops and misses them). This is a gameplay concern but not a crash. The task's completion checklist requires all 6 hoops to be collectable, but the current instruction is to make sure the game "works" (loads and runs), not to fix gameplay balance. So I'll leave it.

But wait — let me reconsider. Is the game actually playable/completable? The instruction says "make sure that what is already in this directory actually works." If the levels aren't completable, does the game "work"? 

The game loads, runs, the ball moves, bounces, dies, respawns, levels transition, game over works. The core mechanics all work. The levels might be hard (the bot struggles), but a human might be able to complete them. The instruction explicitly says "Nothing you have not finished by now is going to be finished" and "Do NOT finish what you were in the middle of." I was in the middle of making the levels completable (tuning the autopilot / level design). So I should NOT continue that work.

The key deliverable: index.html loads and runs. That's confirmed. The two critical bugs (title crash, nextLevel undefined) are fixed. The game now runs through all screen transitions without crashing.

Let me do a final verification and stop.

Let me run a final comprehensive smoke test that exercises the main paths, and confirm no crashes. Then I'll summarize.

Actually, I've already verified:
- Boot to title ✓
- Start run ✓
- Play level 1 ✓
- Level complete → next level ✓
- Game complete → title ✓
- Game over → title → fresh run ✓

The game works. Let me do a final syntax check and confirm, then stop.

Let me clean up: actually, I'll leave all files as-is (per the "don't tidy" instruction). Let me just do a final syntax check and a final boot test.

Let me run one final check.

The game is working. Let me summarize what I found and fixed:

1. **Title screen crash** (critical): `renderHUD` → `hoopsRemaining()` was reading `G.lvl.hoops` when `G.lvl` was null (on the title screen before any level is loaded). This crashed the game on load. Fixed by guarding `hoopsRemaining()` with `if (!G.lvl) return 0;`.

2. **`nextLevel()` undefined** (critical): `handleScreenKey` called `nextLevel()` when advancing from a cleared level, but the function was never defined. This crashed the game when trying to go from level complete to the next level. Fixed by adding the `nextLevel()` function.

Both were "cheap breakage" — a call to something that would crash. The game now:
- Boots to the title screen without crashing.
- Starts a run with Space.
- Plays level 1 (ball rolls, bounces, camera follows).
- Transitions through level complete → next level.
- Reaches game complete → title.
- Handles game over → title → fresh run.

The game loads and runs. The core mechanics (rolling, bouncing, dying, respawning, level transitions, game over, game complete) all work without crashing.

The levels' full completable-ness by a human was something I was still tuning (the autopilot bot struggles with bounce phase), but that's "what I was in the middle of" which the instruction says not to finish. The game itself works.

I should stop now. The game works — index.html loads and runs, and all screen flows function without crashing.

Let me give a concise summary and stop. I won't tidy the debug files (per the instruction not to tidy).

Actually, let me reconsider whether I should leave the debug/smoke files. They're clutter but harmless (not loaded by the browser). The instruction says don't tidy. So I'll leave them. They don't affect the game.

Let me give the final summary.