Tip: If you give a Muncher tile custom graphics, it will still act like a coin when a silver P-switch is active, whether it looks like a coin or not. So make sure to use ExAnimation if there's a silver P-switch in the area.
This is a fairly simple and quick unsampled port of the original Rainbow Road theme from Super Mario Kart, a theme which has spawned countless iterations of it for all the other Mario Kart games after this one. If it's actually good tho, well, I'll let you decide lol
It's best usage would definitely be in a extra world level a la Star Road from the original SMW, but this could be used in space levels in general I guess.
Update: Tried to properly emulate the drum pitch changes this time around, and also removed the pitch modulation since it was kinda useless lol