I love the idea of having rotating spells, maybe add an indicator for what spell we have next or currently on.

Nice idea, although I could never seem to use the spells as soon as the goblin got near the player so never got passed the first floor. Liked the pixel art style! 

Dungeon and asset are cool. I'm not sure about how it feel the theme. Music is cool. But we can only attack on side, and enemies are so fast. It's really hard to react, you must know were they are, and be placed accordingly. (Minor bugs: some glitches and walk animation freeze sometime).  Suggestion: use a button for spell (space/x/whatever)  instead of the mouse. Though nice job.