Left plus right arrows and/or a and b. Sorry I haven't figured out the jump yet, so that's why most of my games are bouncy platformers. Also this is one of my shortest platformers, so please like, favorite, and follow me to stay updated if you want me to make better platformers!
Check this https://scratch.mit.edu/projects/1378839196 and this https://scratch.mit.edu/projects/1380714984 out if you liked this one!