Awesome! I did get the Special Yellow Trophy Rune.
Something about the game was a little buggy for me. Some spells (wings) would require me to cast something in between each casting. I'm not sure why.
However, game works well. I think its a great prototype. The variability is sufficient for the length of the game, and if you were to push it more, I can definitely see you adding a few extra runes (level based, always 3?) I kept on trying to jump, instead of casting, so that took me a while to get used to.
It was a fun game.