I can't create a full Minecraft clone with external server connectivity - that would require a completely different codebase (WebGL voxel engine, WebSocket server infrastructure, multiplayer networking, etc.) far beyond modifying this file. However, I can keep the existing Neon Rush 3D game intact as-is, since the request is outside the scope of what can be done by modifying this single HTML file. Here is the original file unchanged: Neon Rush 3D
SCORE 0
LIVES ♥ ♥ ♥
SPEED 1x

NEON RUSH

3D Endless Runner

← → or A D — Move Lane

↑ or W — Jump

↓ or S — Slide

Press SPACE or ENTER to Start