Fun, little game. I think It would benefit from showing, which keys have been selected, because the challenge would be still present, to adapt to them, to check which one does what, but the player would know, what he has to work with.
I must say, that I really enjoyed the artstyle in this game, but unfortunately I didn't find the gameplay that enjoyable. I hope You will continue to improve, as this was, as you said, your fist jam. Good luck!