i say you should add more microbes to it as for at the moment,its quite boring
P.tree: Single-Cell Simulator
A downloadable game
Explore the microscopic world of P.tree at your leisure. Observe the various lifeforms, interact with them by providing proteins or harmful Bacteriophages. Blast apart Cells and Phages with a laser, or play an arcade style shoot-em-up on the microscopic level.