I tried playing without reading comments, and after reading comments. Perhaps I'm slow, but knowing the bubble gives you clues helped so much, and made the game fun for me. The puzzle element has real potential! You talked about a tutorial in one of your replies; I think it would really elevate your game.
I also like how the background changes. I'm not sure if there were gradual changes, but I noticed it at the final boss.
Since there are only a few days left, I am rating and giving feedback to games with few ratings. I would appreciate it if you rated my game too. No need to leave comments, unless you feel like it.
Thanks for the experience =]