when you press play you'll see the levels. (in the order you should play them) There's a button with a "T" (for tutorial), there you learn you need to press w to change the background color (don't ask why i thought this was a good idea) to make some blocks appear/disappear (depending on what the background color is). hope i could help :3
also the reason i made the jump and moving forward automatic is to make the gameplay as simple as possible.
also also sorry for not making it more apparent, I'll try my best to avoid things like this next time i enter a jam.