This is a really good start. The sense of horror and dread i got while playing was pretty intense, and i feel that you could continue with that theme. The combat is pretty bad, but it gets the job done. I would avoid a lot of shooting in the game. It has the feeling of Half Life enamating from it, and it's really a good choice. Focus a little bit on the story, as the deep ethical questioning doesn't really add to the sense of dread. You should still have a story, just take it more through more actually creepy things.

Cool Game. I Like It, in general.