Good Game!
I actually like it a lot. I do think you’ll need to balance a bit more the difficulty, because it’s really hard to keep them alive for more than a few generations. THe concept is gold, and I do think you could make this work. Graphic wise, it get the job done, the minimalistic aspect is actually of appeal to me ! Unfortunalty, you can recognise unity’s default UI in the main menu.
GG!