# TODO

## ~~Distance-based sound effects~~ ✓
Implemented: `audio_set_listener()`, `audio_play_sound_at()` with linear
attenuation and stereo panning. Used by enemy death, asteroid impact, and
powerup pickup.

## ~~Spacecraft art and entity~~ ✓
Implemented: spacecraft PNG spritesheet (5 frames, 80x48 each), full entity
with state machine (FLYING_IN → LANDING → LANDED → TAKEOFF → FLYING_OUT →
DONE), engine/synth sounds, thruster particles, level intro sequence with
deferred player spawn.

## Large map support (5000x5000)
Audit the engine for anything that breaks or becomes slow at very large map
sizes. Key areas to check:
- Tile layer allocation (`uint16_t *` for 25M tiles)
- Tilemap rendering culling (already viewport-clipped, verify correctness)
- Physics / collision queries (should only check nearby tiles)
- Entity updates (currently iterates full pool regardless of distance)
- Camera bounds and coordinate overflow (float precision at large coords)
- Level file parsing (row lines could exceed fgets buffer at 5000+ columns)

## Spacecraft at level exit
Ship landing at exit zone when player approaches — player enters, ship takes
off, triggers level transition. The intro/start sequence is done; this is the
exit counterpart.

## ~~Asteroid refinement~~ ✓
Implemented: base speed 120→200, accel 200→350, respawn 3→6s, stagger 0-3→0-8s,
random horizontal drift (±60 px/s), moon level reduced from 24 to 8 asteroids.

## Jetpack boost blue flame effects
- Add continuous blue flame particles trailing from the player during jetpack
  boost (while boost is active, not just on burst)
- Add blue accents to the jetpack burst effect itself — mix blue flame particles
  into the existing yellow/orange exhaust plume
