Arrow keys. BTW, you can ONLY walk on green. Also, you might have to jump back on a few times so I highly recommend keeping your hand on the up arrow key.
I used to kind of make Scratch "youtube" until my sister (@hugeinkylake(please friend her)) crashed out at me and told me to make a platformer. So yeah thank you @hugeinkylake and thank you computer for reasons I'm pretty sure everyone knows,
