What an interesting take on the theme. I love the ideas of customizable spells, reminds me of the old elder scrolls games like daggerfall where you could build your own spells :D
This game would work good as a stand alone release, but the game jam format holds it back a bit with how complicated its mechanics are.
I think this game has a lot of potential if taken farther, and i think you should be proud of what you did here
Keep making games!