Huge scope, crazy you made all this! The creature designs are really lovely and distinct and I do love me some STS style pathing. Super big potential for some extremely broken stuff here with the cards, too, upon some balance. As for critique, the cards text cuts off and the cards themselves were quite small (maybe have it rise a little further/get larger on mouseover) and there could definitely be a little more attack responsiveness (stronger SFX, more movement from the attackers, etc.) but what a crazy strong foundation for something really fantastic.