I just gotta say: WOW
I am very impressed by this game, although I was a little bit lost at the beginning because what you have to do isn't that obvious. Heh, I did have to go chck the walkthrough, I'm ashamed of being stuck at the beginning. But ANYWAYS, good story! Like some people might have mentioned, contact on the radio from us would be enjoyable, although you left out the main characters face on purpose, and a voice might have added a nice touch to the dialogue. The characters you chose were interesting, might be fun if you could mention some history of those scars on some people in future sequels. And seriously (well not that seriously), the final boss warning would have been nice because when I beat the guy I had nothing left on me and I was one hit away from dieing. A suggestion I might add is some free roam in the game, like side jobs to get some credits when we have to buy equipement. Some pictures in the credits have gotten some question in my mind, can't wait to know what they will have to do with the story, I hate cliff hangers :P . So yeah very good game, nice story, could add a few more details, but good all the same.
And my last note is I'm sorry if this review was very long, but I do hope that it helped.