Graphics/sound/presentation overall seems good, but the character seems to jitter back and forth a bit when I move. It seems like I didn't run out of key presses that often; perhaps more interesting things could be done with this concept (maybe some sort of puzzle elements?). On my second playthrough I fell through the floor a couple times near the end, I think it was the second-to-last section not counting the ending part. Also the jump on the last box seems a bit finnicky; I keep missing when it seems like I should make it.