I didn't see the evolution part come to play, but there's some really interesting gameplay here in this game. Carefully manipulating the control rods was really satisfying!
I might suggest some UI improvements, like the temperature gauge being a bit more clear on what levels started where (like a bar, or even just an indicator of when things would tick over), and I think I would have liked dragging the cooling rods to a desired height a bit more than simply pressing a button. But all in all, great!