Holy freaking shit, right from the logos this one's amazing !
The atmosphere is amazing i really like the very metroid prime esque main menu theme, Graphics are super cool with the low poly pixel textured combined with high def lighting (nice of you to have put otions to turn it off so potato pc users can still enjoy it as well ^^)
The integration of the theme into the gameplay is really clever , the overall tone where it feels like the first system shock mixed in with portal like puzzles and humor really gives the game character, it is spot on and even if i compared it to those games it is quite original with the heart drop thing and the blocking portals. And that ending was really funny XD
Had no issues with the game itself, it feels really polished as is, just one technical thing, had some weird shadows? dark blobby things ? on some textures some times, so not sure what that is.
Other than that really impressive game overall :)