Hey man, to be honest there is not a lot of stuff here to go off of. I don't think anyone can tell you if you should or should not work on a project based on a little information. It sounds like it might be a cool mechanic getting nutrients from different sources but i'm not exactly sure how you will go from a bacteria to a teenage girl (why teenage?).
What I would say is take some time and make a small prototype with the minimum things you think you need. Get some boxes moving on screen and get your basics down until you have something playable.
If you can make a prototype that is fun without all the fancy effects and everything, I would continue working on it because you know there might be something there!
thank you and yeah ill try and make a prototype, il need to work on the nutrient gathering bit, not sure why teenage.
also I'm new to this website, any advice on how to post where to post etc ?