I would help if you said what the shop items did without having to buy them. Even heal (how much health?). Also, that buying anything uses a turn.
Also, do I get the coins lying around at the end of a level or do I have to collect it before then? If the latter, a magnet upgrade should be bare minimum.
Cute graphics and the gameplay is simple and satisfying (apart from the above issues).
All your games are very fun but very short. They're jam games, so that's okay.