Really great idea for a game. Took me a few deaths to understand what I was supposed to be doing in regards to the tower defense part, then a few more to realize the only viable approach was prioritizing the shortest, cheapest tower. Never got enough to buy the other two. I think it would have helped a lot to give each tower a more distinctive look, at least a unique paint job, as it just wasn't always easy to tell if that last one was a short one or a really short one. As others have said, the delay on flipping back over and the fast reshuffle felt especially punishing. Maybe making the cards immediately flip back over when the player starts clicking a new set would have been viable. Only got past the cats once. Anyway, all that said, really great concept and great work on your game!