This is one of the best games i've ever played here on Kongregate, i just love it.The one thing i'll change is the condition of that hard badge, instead of just playing over and over again trying to get lucky in the harder/nightmare difficulties, i think it's fair to aim for a particular score like 350,000/400,000,that way you could get the badge in other difficulties, depending on how you play,anyways it's a great game and i hope it's not the last. 5/5.
The first you should do is just wait for a planet to come up from the asteroids, then use the gravity well to make it go counterclockwise, (the easier way to control a planet is using the well just behind the planet orbit, just for like three seconds, you'll get it) so the planet grows faster colliding with the asteroids, when you have enough influence you can go farther away and control the big red meteors,you should destroy these ones, it's really annoying when your biggest planet just dissapears because of them, (use the sun to destroy them) the blue one too, then try to make the planets collide with the little the little things leaving a greeny stuff.
Then it should be easy to make a 20,000 mlln planet. Anyways i couldn't get the screenshot thing to work i don't know if it is just me, but it's a really cool game. 5/5.