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
3 crates with 3 HP each. They degrade from solid → damaged → critical → destroyed. Crates block bullets and movement until destroyed. HP shown above each crate.