ARCADE BENCHMARK 02: Reactor Rush. Build a complete playable browser arcade game as one self-contained index.html using Three.js. In a compact arena, collect unstable energy cells and return them to a central reactor while avoiding escalating hazards. Carrying several cells must create a clear risk trade-off. Score deliveries, reward batches or quick sequences, show reactor stability and player danger, and end the run on destruction or critical instability. Include keyboard and touch-friendly controls, score, fail state, high-score display, and instant restart. Submit the final index.html only, not a mockup or explanation. It must run in a modern browser with no build step. Full design reference: https://gist.github.com/ponderingdemocritus/cf2b3f3933cadd06af9fe0e0c5aeabdd#file-index-html