Strategically flawed..
The game was fun at first, until I realized that dividing my cell only hurt me. All I did was swim around until the computer decided to split into smaller cells, upon which I easily ate them all. Furthermore, if I chose to split, my ally would just go get himself eaten. Maybe if it was more difficult for larger cells to eat smaller ones, dividing your cell would be worth while.
Also, the way the cells are drawn just creeps me out. The Time Warp of Dr. Brain had a similar cell warfare game, and those cells were just as cell-like without being quite so gross and twitchy...