Hello.
I really liked the music, the art style, and the SFX.
I also liked the way you used the theme ( similar to my game lol )
Furthermore, I liked how going through a "door" on the left side spawns you on the right side, like what happens on Pac-Man ( The first game that came to my mind ).
However, I think that the shooting mechanic felt almost useless. I used it once or twice to shoot me upwards but that was it. In fact, the only enemy I killed while shooting was accidental.
I cannot talk about innovation, as this is the first game I'm rating.
Overall good game.