Use the Left-Right arrow keys or A-D to move. Press the Up arrow or W to jump. The rest is in the game. IMPORTANT: I don't know too much about health, but you should probably avoid playing this game to the end if you have epilepsy since the Rainbow Doot is flashing, like a lot.
The most of the platformer script is by @FUNUT (I handled the trampoline part). The song I found on YouTube. NOTE: I finished this on Halloween morning, but I shared it on 7:17 PM (My time) when it was dark to make it more special!