Press A to select a level and left/right arrow to turn. If it's too slow, try changing the settings using the script in the stage. It runs a lot better in TurboWarp: https://turbowarp.xyz/#415853786
If this gets support I might add more levels/gamemodes/etc. If you have any optimization ideas, post them in the comments. Made in 2.0, like pretty much all of my projects. Updated August 17th 2020.