Super cute! Love the idea, hope you continue it
A little friendly feedback
At first i got really confused when i tried to swap 2 items (that didn't make a group of 3) and nothing happens, really thought the game was broken, after a couple of tries i understood that only, "valid movements" are allowed (yes i am a little dumb :B). A little feedback for "invalid movements" (like a little item shake maybe) would make it more clear for people like me.
Anyway, really solid entry, hope you keep developing it!