I'm impressed that you did all this art in the scope of the jam. It looks really nice.
The gameplay is solid and fits the theme well. I like the switching between easy control and hard control.
I think it would be a lot more action-y if the spells didn't last so long. Maybe 10 seconds instead of the 30-ish now. I felt like there were very distinct phases of getting a power-up and then holding it for a long time.
I missed a lot of juice that I think would make this presentation excellent. Sound effects and particles on hit, sound effects on a shot (different for each spell), and audible enemy attack warnings would be excellent.