This game is art
Everything is made in beautiful details, awesome. But the graphics and theme is the same as that of Alien Disorder's one. These two games are alike.
I expected you would make something more advanced for your hit detection, than just touching an enemy and getting damaged. Monsters that spit at player and try to predict where to shoot constantly miss.
I noticed 1 glitch: when the monster, that can jump and wears a yellow hat, dies, its dying corpse sometimes freezes in the air. You must run gravity scripts for corpses, because monsters can die while they are in the air. That's just one glitch I seen repeatedly, and everything else is fine.
You failed very hard at making a frightening atmosphere. I'll tell you why. Because the main character is too "strong". And because he wears a massive marine suit and is not afraid of anything. And all this stuff from your game, story, monsters, are so generic, I think I've seen similar things a hundred of times.
But I'll tell my secret. I freaked out in your game once, when I was so excited shooting a thing that spits on me from the ceiling, and there was flashlight illuminating in front of me, so while I was doing that I didn't notice a red bombing ant coming from behind. I was like "AAAA--", jumped from my chair and killed it.
Still it is all very generic, good artwork though.
+8 for artwork
+4 for programming
-1 for bad keyboard control decisions (tap arrow key two times made it hard to complete last level as I fell of platforms)
-1 for bad design decisions (when I get hit I face the other side I was facing)
-1 for not letting me shoot at different angles (notebook users could aim as well as with mouse, because camera follows the protagonist)
-1 for some AI decisions (the AI is dumb, monsters often fall off the platforms, and flying monsters try to get on same height with me, but they hit a wall and fly the other way)
there's no perfect game