funny 64-bit expansion

Special thanks to Nobonet, sm64-roblox and [n64decomp/sm64] for the base movement! I simply build and script beyond their work to make it better. Credits to: NotRoblox for the Robux jingle :) urgrandmother436 for the lighting setup and lighting code :) BIG CREDITS to [SM64 Reloaded] (and the sources of the texture pack) for the textures of the materials / surfaces :] I will remove them if seen that it is not wanted here.