Love the setup, a war of magicians, that's so epiccccccc !
Very creative proposition!
I think the UI/sprite animation of the enemies did lose me a bit; I wasn't sure if it was me who was attacking them, or them attacking me at some point. However, I really liked the fact that we could see the other towers in the background far away with the little point of view at the top of the tower; it did make the threat more tangible!