Lovely presentation, but quite baffling gameplay. I understand you have to join sprites together to form the attack patterns in the cards on the left, but although I got through a few levels I never got that "ah ha" moment of properly understanding, then using that understanding to solve a puzzle deliberately. There's the germ of a good game in there, but if you can't teach you players about it, nobody will find it!
Feels a little bit like I what I imagine Enter The Breach is like (I've got it, but not played it yet). Unfortunately, without a more thorough introduction to the mechanics I won't be able to decode how it's meant to be played.