Curiosmos is a galactic playground of planet creation and creature evolution
Infamous evolutionary flop Spore, for all its flaws, still had a lot of magic to it. It was fun to design your weird creatures, to watch them try to walk, and - in principle - to turn your humble creations into a spacefaring species.
Curiosmos is a very different game, but it has a little of the same appeal. It's a galactic playground in which you smash meteors together to make planets, then tinker with the ecosystems of those planets to make life and watch that life evolve. All while a hungry black hole lingers nearby, eager to consume everything you have created. There's an explanatory video below.