Very unique experience. I spent quite a bit of time in this game, and I'm happy I did when I finally solve all the puzzles! Good job on the level design!
With that being said though, I do think the game is lacking a lot in the art and sound department. The card arts were ok, but the biggest issue for me was the UI, which took me a long time to figure out what were each of the elements were and how they interact with the game. The music is just ok, sound effects would have been nice. The rules of the game were based on the assumption that players already play other card games like Hearthstone (which I found the combat system was most familiar to), but that's not always the case so a good onboarding experience would definitely helps this game a lot.
The mechanics were very innovative, and some levels were harder than the others for sure. The one that took me the longest time was level 14.
Overall though, it took me some time but I had fun with it. You just need to put more polish on this to make it to a great game.