I like the music, and the design of the pentashade stone. The title screen changing after clearing the game is a nice touch too.
There are a few grammar errors, but nothing too major, the story is still understandable.
Not sure if it's just me, but stage 1 felt more difficult than stage 2 or 3. Especially during the second phase, when the boss teleports into a blind spot and I accidentally run right into his attacks.