bad song lost half star
Monster Attack is a better name! lost another half star
you now have -1 star from me
lost another half star no guide controls ..
YOU GOT NO STARS FROM ME!!!!

Gun needs better range, when spawned birds are too low to shot, which makes last ditch defense impossible. Also, this is a weird thing to notice, but why is score pluralized?

The game is repetitive and you need to move the birds higher so you can actually shoot them. I 'm also guessing this is your first game so good try keep trying to make something better.