Use arrow keys to move and jump. Collect the coins. Jump upon Goomba enemies (twice!) to beat them. z to shoot ink and down arrow to turn into a squid. This project was just made for fun so the levels and enemies are the same.
check out the original project, it's way harder and one of the best working mario projects i've seen on scratch. all sprites by nintendo (except the title screen and last level art, those are by me.)