Wow, cool story!
Moderators saving Earth :D
Liked the designs and the explosions looked awesome.
The only thing that bothered me was the rain that was distracting me from the beginning.
I think the rain makes it feel a little out of place for me.Honestly it was an eyesore(just the rain:( )
Also it was hard when those round thingy started falling on you and killed you much faster when you are about to get to the big bomb.
The stormy weather looks too grey, overshadowing the the colors of the fighter planes making it look more Dull.
Personally i felt that moving from one corner to the other was key to save earth, more than getting to places where random rockets fell from.
You could also auto generate them instead of a pattern(i know that its not too plain but definitely not random).
The game needs more weapon upgrades even though it felt short.
Hope you do some fixing :)
I had fun playing this game, it was challenging enough(which any a gamer would want).
Well done on the music and the people who supported you with their art.
Good Luck further :)