There are a few problems here and there some small ones like when you destroy an asteroid and it just disappears, no sound and no particles, and some bigger ones like when you push an arrow key the ship shoots in the current position before rotating and then shoot.
These things that I pointed out were not to be negative, is just some things that needs changes because you got a pretty good game with a pretty good art style and an interesting idea and is a shame it is dragged down because of these flaws.