Okay wow, this was really impressive!
I adored the space-invaders-esque enemies, they are so cute~
There's so much attention to detail in this little game, it's really good and fun, and controls very well. The gameplay is good and difficult without being impossible.
Graphics are a bit mismatched I feel, and it's really difficult to see the background stars on a 4K monitor – one pixel per star just isn't enough, especially when it's moving~
But all in all a really solid game, great work~!