Lovely game, the graphics are incredible for a jam entry - the best looking game I've seen in here, with a biiig margin. I really like the blending of movement and actions with the rhythm - reminds me of patapon, which is one of my favourite rhythm games. The narrative is good, and engaging and game is considerably longer than I expected it to be. Having some spells on the first 2 notes and other on the last 2 notes made for a really fluid and organic combat system - lovely design, well executed.
Criticism-wise, the interface is decent, but the text on the letters doesn't display properly - it overflows to the sides quite a lot. (downloaded version) The difficulty feels just about right - though sometimes I couldn't even finish a single spell, other times I chained 4 or even 7 spells one after the other, so it's just about getting in the groove right. A little more visual feedback on when it is time to press the note could help. The background song is nice but gets really quite repetitive after a while. Adding some more variety to the soundtrack would help, I think. 