First of all, I really like the design of the character, but I had a big problem figuring out what I should do. For example, I found a key, opened a door, but there was nothing inside, and I just walked around with no clear goal.
One thing I really liked was the light produced by the thunder, which adds a lot to the game.
This could be so much better if there were more signs showing what you're supposed to do, or some kind of indicators letting me know where I should go.