The drawing to cast magic mechanic is fun. And balanced by making stronger spells harder to draw and remember. The fireball spell's hitbox made it not very useful against ground enemies though. The music adds to the mood without being repetitive or annoying. The options had the music and sounds off by default despite being marked as turned on in the menu (or did the X mean "off"?)
I think that the level layout is unnecesarily complex and some floors are unneeded. Like the bottom floor has nothing useful there, and I didn't seem to be able to attack enemies from the 3rd floor, but still had to go through it to reach the top of the castle.
The graphics are very nice, but the tile placement in the level with the floor blocking the background hurt the look a bit. Its a pretty good game overall.