feat: pudding monsters waves 1-3, mahjong match FX, background art
Pudding Monsters:
- Rewrite level bank to 75 levels across 5 named chapters with a teach →
drill → mix curriculum progression
- Implement 8 mechanics: sleepers, ice, slime trails, hypno goos, springs,
tunnels, buttons+bricks, powerlifters+crates
- Split scoring into stars (target coverage) and crowns (par solves)
- Introduce planFlick/applyPlan so scene animation never disagrees with
engine state
- Add mutable board layers (state.board) with generic cloning/hashing
- Level select: chapter rows, mechanic pips, tooltips, chapter-complete panels
- Monster type rendering: green/hypno/lifter colors, sleeper shut-eyes+Z
Mahjong Match:
- Add MahjongFx.js: shatter, burst, flash, ring, floatText, recoil,
freed-tile chimes
Bloxorz:
- Add background images for menu and levels
Infrastructure:
- docs/puddingmonsters-mechanics-plan.md: living mechanics build-out plan
- tools/verifyPuddingMonsters.js: 1295 regression checks
- genPuddingMonsters.js: curriculum generator with load-bearing gates
- Add playSoundEx() for pitched sound cues
- Update asset manifest for all three games
