Its a very nice idea! I can see you easilly developing many more mechanics on the puzzles in this game to keep the player engaged and at the moment the game is in a good state in my opinion.
The only problem i encountered is that sometimes when you spam your attack the game lags, a lot... ut Its only on the last level for me.
The art is nice and cosy and the music matches the nature of the game.
I like your approach on the limitation usage btw!
Now i think its just a matter of expanding your game.