I like the idea of the game, but was having a lot of trouble with the controls. Trying to draw different shapes while running and dodging the enemies was quite difficult for me.
The rune it listed and what it looked like I drew did not always match up. There were several times when I drew one shape, and it registered as a completely different one. Sometimes it made sense how it got the result it came up with, such as a circle resulted in a spiral, but other times I had no idea how it decided what it was, such as an L resulted in a an X with a line connecting the top. It wasn't just that my drawing was poor, though there were definitely times that that was the issue. There were times that the colored line following my mouse clearly looked like one shape, but the rune was something else.
Aiming with the fireball didn't make sense to me. Sometimes it seemed to follow the direction my wand was pointing, other times it seemed to go a completely random direction. The directions in the tutorial didn't really help make it clearer to me how I was suppose to aim it. I think the way I moved my mouse when the second colored line appeared was the key to aiming, but I couldn't be sure of that.
I think it would have been helpful if in the tutorial you mentioned picking up the item by pressing "E", and then using the num keys to use the item. In general, it wasn't very clear how I was suppose to use the item I picked up. I picked it up, then clicked the number 1, but nothing happened. I tried clicking the mouse button, then 1, and the first couple of times I tried it didn't seem to work. I did eventually use it, but I'm still not fully sure how I did it.
I think the drawing mechanic is a cool idea, but I was having so much trouble with it that took away from the gameplay instead of adding to it.