Really nice game! Especially for this short amount of time. I like the minimalistic art style and the game flow. Also you did a great job regarding the sound design!
In my opinion the game controls could be improved a little bit by allowing a small delay when pressing two buttons at once (to jump). I often move to one side, when I actually wanted to jump. However that's a personal preference and maybe it's intended to make the game challenging.
Overall a super cool game! Congrats :)