i agree with AM here. seems more like an Old-school shooter, warts 'n' all. its by no means bad, just needs tweaking and improving.
my biggest gripe is the hitbox, and it seems either awkwardly placed, too big, or both. i had many unnecessary deaths because of it. i think its positioned to far forward, but i could be wrong. maybe making the player sprite smaller? or moving the hitbox closer to the center?
also, like other people have said before me, the enemies blend into the background. in the first part, before the C.E.M the bullets are fine, but inside i could hardly see the small bullets, which killed me.
on the plus though, it looks nice. the sprites are clean and the weapon effects are nice, even though the enemy ship movements feel stiff, but you were probably focusing more on the game itself than fancy ship movement.
all in all, its what i'd expect from a first release, needs some work. theres potential, but more work needs to be done to bring it out.