The game was actually supposed to have a visual to indicate which direction the spell was cast in, but it seems we accidentally did it such that it only shows in the Unity editor (silly, I know). And yes, the goo is definitely too unforgiving, we actually found a bug with the way it damages you right before we were about so submit so had to scramble to fix it, and I think that has caused a couple issues.
Thanks a lot for playing the game anyway!