You create blocks, but each block can have different physics properties. My idea was to create a reverse-engineering challenge, where you'd have to figure out the underlying algorithm behind the spell system, which would help you in achieving the goal of the game (ascending to the sun).
I guess it would also be fun if you could affect more stuff, like create wind zone or sth. I thought about it, but I guess it was outside the scope of this jam project. Thanks for playing through it though!