The only thing i can criticise about this game is the music loop, but you stated in the comments that it was a placeholder that stayed, so it is not your fault :)
Finally, i liked the idea, i didn't expect it to be like that when i first saw the game and i got happily surprised. The pixel art shows the game good enough and the mechanichs are clear. There are not many levels, but they're all good, and that's very difficult for a jam game, congratulations :)