Cool submission. Liked the style of it. Somewhat isometric, but not really... very nice.
I would have preferred movement via WASD and have the buttons 1-4 switch the current spell. I did not last long in my runs because evasion was so difficult to handle together with attacking.
Also sometimes the attack of E would not work?
The cooldown visual could be darker. Sometimes I was unsure if I could use that spell already in the heat of the battle.