- Chain reaction explosions: player kills trigger delayed secondary blasts
that can destroy nearby missiles (bounded to one extra tier)
- Inter-wave "COLORADO DEFENDED" recap animation showing surviving cities
(+500 each) and leftover missiles (+25 each) with tallying sounds
- Dynamic wave bonus: replaced flat SCORE_WAVE_BONUS with per-surviving-city
and per-remaining-missile bonuses, emitted in waveComplete event data
- Vector-style skyline: hand-authored Rocky Mountain ridgelines with snow
caps, building presets for varied city skylines, wireframe silos/cities
- Minimal VectorFont module for the recap banner text
- Curved CRT overlay: WebGL barrel-distortion pipeline with chromatic
aberration, sheen highlight, vignette, and pulse on impacts
- Three new 8-bit SFX: explode, explode2 (chain), count (tally)
- Updated verification tests for chain reactions, wave bonus breakdown
