I can't seem to figure out how to progress after the first spell (and jumping up just happened at random once, I can't get back up there). Am I missing something?
You can break the wall in that room using the spell. Then you can go up the stairs and progress.
If you cant get up to the room anymore (not quite sure where you are stuck) then just know that the enemies on the layer shoot you, and when you get hit, you get shot up