My concept for a game - Life After Earth

Since October 2008 I have been working on a concept for a digital game as part of my university course. My game concept, Life After Earth, is a science fiction adventure game intended for the Xbox 360 platform set 400 years into the future in which you control both a human and an alien character who share the desire of prevailing as victors of the brutal war that they are stuck in. Below is some artwork from the game featuring the game's two main playable characters, enemy alien race concepts and some basic environment concepts . . .