Thanks for the detailed comment, I could agree that if the spell typing is separated from the casting point it would improve things quite a bit. After thinking about it I would at least change it so after you pressed enter, spell does not go out immediately, but waits for one more key press.
As for the point regarding the music it looks like you've only played tutorial, because chill music is only for the menu+tutorial, but during the main part of the game the music is changing.