Hello! Thank you very much for playing!
About switching between spells, the Hotbar idea.. actually I don't know how that could go past me, is just so obvious. You can use the mouse wheel or "Q" and "E" to switch between the 4 possible spells you can have at the same time.
The wall can block the projectiles, so you can dash in, create a wall and dash out again to attacks through it. In general I just created some spells to see what I could make, I had more in mind, but I don't know If I could make it for the submissions or make something "useful".
The unfairness of the enemies was so obvious that I had to make the player immortal or you could have a very bad time trying anything. I didn't like that either.