Why would you hate the green plains of your world? When the stars come to take it away, the sea of grass will be something to fight for...Nice job for a months work!
Liked the music (xcept maybe the second or third track). Very retro.
As a game, I'd say classic
bullethell, which is not really my type of game. But I liked it for a little while. I did not care much for the required pixel precision though, and the invulnerability periods after dying seemed waaaay to long (I died in the middle of a level and when I reached the boss, I was still invulnerable).
What confused me more than the ZXC choice of controls on my QWERTZ keyboard (on top of which nothing tells you that C is a key to use) was the fact that you gain Score simply by shooting. And LOTS of it. Made everything that gave points in the level almost pointless (why would someone pickup "+5 points" when you get hundreds every second). That just seems like a strange choice to me and I'd get rid of it. Let everything in the game give points - except for the shooting itself.
Still, it was fun overall. Well done.