Very impressive - I can't believe how much you managed to fit into a week. Classes, spell craft - seeing multiple options on that title menu we super surprising for a game jam entry! I confess I didn't go too deep into the various systems - a little too much to explore with so many games to play - but I'm impressed nonetheless!
Some things that could have improved this for me:
- A bit of a spell description when you're choosing what spell you'd like to pick up. Helps players make the choice and gives more context to the effects they see on screen
- In a game like this, I think increasing the number of projectiles is a more appealing upgrade than simply upping the damage of each. (This might've been a feature of the spell forge, so sorry if I missed that). You want to see a whole lot of spells flying around screen after some level ups - it's a much more visual difference.
- I felt that difficulty could have ramped up a bit faster. I think I was on wave 7 by the time I started taking any damage, and I'm not a particularly skilled gamer either.
That said, super polished and expansive game, you should be very proud!