This is why I like Kongregate so much, once in a while you see a game like this that further explores the mechanics of video games. 5/5, nicely thought and a clear success.
OK, so far I've been able to finish the game sparing 15 human lives and 4 androids, by using self-destruction instead of colonials for jumping, and by avoiding the soldiers instead of killing or contaminating them. I'm not even sure this is the max you can reach. It may be worth an achievement, on Kongregate or inside the game.
Very good project, though there are some things I really wish to see in the future, such as more monsters, objets you can actually interact with (or move or destroy or whatever), and the famous water blocks. Still truly enjoyable.