- New alien types (basic, spread, missile) with distinct speed, fire‑rate, explosion colors and textures.
- Implement spread‑shot pattern and homing‑missile behavior with steering logic.
- Asteroid constructor now accepts a speed multiplier; level speed increases each level.
- Extend Bullet to support homing missiles (new texture, lifetime, turn rate, steering).
- Introduce CRTPipeline post‑FX (barrel distortion, scanlines, vignette) and register it in the game config.
- Apply CRT pipeline to GameScene and MenuScene.
- Add custom reticle cursor graphics (rotating outer/inner layers).
- Update BootScene to generate textures for new alien types and reticle.
Brian Fertig