I definitely had two endings, when only bacteria survived (bad) and the other bacterial survived (because of walls). Still lost ahah so I am not sure how to approach it.
I think the very scientific approach to the game would loose a bit of the fun aspect of having bacteria turf wars, but happy to see how it turns out if you work more on it. Fun over accuracy any day as games are meant for entertainment. If it takes a lot of testing to win and randomisation makes the game unfair, then it would hurt the player i.e. doing everything right and still get punished.
Interesting take on simulation games though, hope you keep making them!