If you don't know (which you should), the controls are W,A,D (or arrow keys) to move. Fully mobile friendly.
If you can't toggle rainbow enemy, click the flag again. In this platformer, i have added several things e.g character customization, buttons that can make level parts appear/disappear, special enemy spawn requirements and other random things. level 8. press E. For mobile players, you'll need to get lucky - there's a 2.5/100 chance (1/40) to have a spike send you in the air without dying. So uh.. good luck. Literally.