It would be a great idea if you made the demon spawning automatic, but upon a designated point. Also, it would be interesting if you included some sort of protruding spike/rack of some sort, so that pushing/flinging a creature into the wall could do additional damage. Also, some levels in particular Arena are just simply unnecessarily difficult.
I find this very interesting, by any chance have you read any of Locke's,Plato's,Rene Descartes works? Because it is immediately obvious that certain concepts appear, such as the perceiving of such qualities by people. Also the uncomprehending nature, as described within Plato's cave.
I find that this game is somewhat concerning, that through your wanting to strike off and create artistic games Nerdook, you have created a game that does not create interest, as much that it's purely on luck for the majority of the game, and that unlike Monsterhunters there is not visible way to check stats + upgrade + even use cards when you wish. So it's somewhat of an annoyance that the computer can easily defeat me with continuous elite units etc. I find that this game has replicated what most persons would define as a very boring game, as the random aspects are only there to spite the player into an infinite grind. i would give this game a 2/5 due to lack of creativity and was somewhat disappointing compared to your previous games.
Mabye this a bug or is part of the game. But on 2-12 when you defeat the base but leave the archers, as soon as the boss spawns he pushs back your troops. and while he is talking a wave of arrows flys at the paladog insantly killing/losing the match. Mabye have you paladog flyback as well.