Really neat use of the themes! The simplicity of the match-ups made it a bit rougher since if you are on the wrong type, you need to leg it until you can find a blood cell to change which can be dull at times. Maybe an option to do damage even while being the wrong type would be a nice way to take the concept further. That way 2 paper units could take down 1 rock, etc. But that's a pretty minor thing and overall it was a good deal of fun to play.