Its a really cool idea. I like that you can burn elements. At first it wasn't very intuitive but then I read the manual and I knew what I had to to. At first I wondered why Venus is an egg and why there wasn't a new planet to build but then I read the manual again and I knew I have to hatch the egg with heat and without radiation. I thought I have to build asteroids so I built some. I didn't play it to the end. What use do the asteroids have and how is radiation created?