This game is set in the Exile universe. The character in this game is the main character in the main Exile game. Exile is an interactive graphic novel that includes this as a minigame.
I agree, there's basically one winning strategy in my experience. I just would load up on reproduction, speed, and strength, spread as quickly as possible to open bubbles, then zerg around knocking off the other colors one by one.
 "Don't Get Shot - Issue 1"){kind=icon}
 "Canabalt"){kind=icon}
 "Multitask"){kind=icon}
 "Phage Wars 2"){kind=icon}