Use WAD, SPACE, or the ARROW KEYS. Also click the black arrow at the bottom right and you can change the settings and more instructions are there.
Bugs: Please comment any bugs in the comments below. Credits: I used https://pixlr.com/x/ to edit things. The blocks came from http://clipart-library.com/clip-art/247-2473620_mario-blocks-pixel-art-mario-block.htm and the mario sprite was made by silverbolt00. Thanks to https://play.nintendo.com/printables/uncategorized/exclusive-download-super-mario-bros-song/ for the mario song as well.
