This was pretty fun. It reminded me a lot of the cell stage in Spore like someone else had mentioned. I think one thing I would suggest is providing a bit more feedback when needing to collect the material for evolution (the period after you find a mate, I mean). Basically, I never really knew what I needed to get. I knew it needed to be those white outlined objects but I didn't know why sometimes I'd pick them up and other times I'd keep on passing over them.
Great work with this though!