One question, is it a game you want to play, or is it just a game you can make? My guess is the latter. While the strategy involved may be intriguing, I'm not sure about the idea as a whole. My input; Have the cells floating in proteins. Proteins are like resources, once you collect enough proteins you can have a cell divide. Then based on the type of proteins collected you can choose how you want the cell to divide. You can choose a movement cell to make the macro move faster, or be more maneuverable. Or you can choose to have the cell divide into an offensive cell, defensive cell, or even a converter cell that uses proteins to form new and better proteins that can be used for more advance cell division. Then you can have viruses or competing macros that are in competition for resources. You have a decent idea, but it needs more thought.. Pardon the pun, but I look forward to seeing what your idea evolves into..