Really fun game! It's a nice take on the theme that wasn't just space. I like the variety in the enemies and the different levels. The title art is cool too.
However, this game made me super dizzy! Not sure why, maybe the speed of the background or because the foreground is slower than the background, for parallax you usually want the background to be the slowest thing since it's furthest away, you see it for longer. I also felt like I couldn't blink or I'd miss something haha.
Great job overall!