Congratulations on submitting the game!
I got a high score of 8800 :)
The progression from the first to the 3rd enemy felt impactful.
As others have mentioned adding sound would help this game a lot.
also maybe like a scrolling background (if you can manage even with parallax) to indicate that you're flying through space.
The art fits really well together, well done on that front.
Great job :)