This is a war of reproduction, where one cell is attacking another, in order to become the biggest cell. The only way to win is to fight back.

When you play this game, you will get to know a lot of things about the way reproduction works, and about how cells grow. You will also be able to mix sperms from different males, which will cause some of them to create a net-like structure to prevent other sperms from moving forward.

If you want to have a better understanding of this game, you can find a whole lot of information on the website.