Pretty cool. I think these types of games can work very well in a game jam, but keep in mind that people have a lot of games to play and if they get stuck at a puzzle for more than a minute they'll quit before completing it. I think it would have been a lot better if you had a little hint pop up if the player made no progress in, for example, 30 seconds.
All of that aside, I really like your art style and I think you can make something great if you keep practicing game dev. Good luck on your next game and your next game jam! :)