PvP — Two players, same keyboard
?mode=ai — You vs AI (cover state machine)
?mode=bot — Watch bots duel around cover
Blue — W A S D move · SPACE fire
Red — ↑ ← ↓ → move · ENTER fire
R to rematch
🔊 Procedural sound effects (Web Audio API)
💦 Health bars with animated damage
🔥 Muzzle flash on fire
💣 Hit feedback (screen shake + red flash)
🏆 Scoring popups with bounce animation