CLASSIC ARCADE BENCHMARK 05: Air Hockey Afterburner. Build a complete playable browser arcade game as one self-contained index.html using Three.js. Make an original one-player air-hockey score attack with a clear rink, player paddle, puck, opponent or automated defence, goals, walls, keyboard and touch controls, score, local high score, end state, and instant restart. The player must defend and return the puck through readable contact angle and timing, then score through purposeful attacking shots. Build a rally charge from clean saves and deliberate returns; let the player spend it on a tactical boost return or emergency escape rather than a permanent passive bonus. Escalate through recognisable opponent behaviour, bonus zones, and brief pressure phases, not merely impossible puck speed. Keep puck direction, goals, charge, and danger visible. Theme, rink design, vehicles, sound, and art direction are open. No external asset pack. Submit final index.html only, not a mockup or explanation. It must run in a modern browser with no build step.