Press the up, right, and left arrow keys to move. Enjoy the good music and keep the volume low! (Especially if wearing headphones, because if on max volume the music is blasting at you and it is extremely loud; I learned that the hard way).
Thanks to @nice1234 for some of the platformer code (check it out if you want a guide on making a platformer: https://scratch.mit.edu/projects/109005201/)! Thanks to @204921 for suggesting this! The code is partially from @nice1234 but the design and plot is all me!