I think there's a lot of potential in a concept like this. It reminds me of Magicka wizard wars but uses simpler controls which I think helps make it easy to pick up.
I won by using fire over and over and didn't see the need to use the other spells. I think there was a bug with the AI since it basically just kept walking in to the wall above us over and over doing nothing. Still it was fun when AI was working.