I'm always a sucker for games about my favourite solar system object, nice one! The art was fantastic and the sounds were used quite well, and the concept itself is pretty great.
However, the game itself doesn't work on Itch. The gameplay also got fairly boring after a while, so I'd really recommend adding in a lot more elements to mix it up.
Overall, still a pretty good game. Really brought me back to being a kid and playing a game where you smacked asteroids into the inner solar system as Pluto.