Step 1. Press PAUSE

Step 2. Make a circle of Diamond as circular as you can

Step 3. Fill circle with Black Hole

Step 4. cover entire circle with WATER or something that is mobile

Step 5. Press PLAY (unpause it)

Step 6. press PAUSE again when pressure is able to hold water against the pull of gravity

Step 7. take out about 50% or more of Black hole in a circular shape again, Fill with WHITE HOLE

Step 8. Add ICE to the top and bottom to act as Polar Ice Caps

Step 9. Add little dots and lines of Uranium to simulate deposits of it

Step 10. Add drops and dollops of Metals and SALT to both sides to simulate metal deposits, use all forms of metals including PSCN and NSCN's

Step 11. Add CNCT as hard bed rock base to both sides

Step 12. Add STNE as soft upper base to both sides

Step 13. Press PLAY for a few short seconds (about 10) to allow all things to settle. (SALT will float to the top of all layers)

Step 14. Delete all metal drops and dollops that show above the STNE or CNCT

Step 15. Fill in gaps between the rock bases and the Ice caps

Step 16. Press PAUSE

YOUR PLANET SHOULD LOOK SOMETHING LIKE THIS
http://i355.photobucket.com/albums/r465/superKoolpictures/planetdemonstration.jpg

Step 16. Using the HEAT tool, melt everything in the STNE and CNCT sections and all the metals, Metal melts at 1000 C while PSCN and SALT and all other metals melt at 1500 C, STNE below everything else except wax.
(NOTE: LAVA IS EXTREMELY DENSE AND HEAVY, IT MAY FALL OFF YOUR PLANET, INCREASE THE BLACK HOLE TO HELP PREVENT THIS, IF YOUR PLANET BECOMES DEFORMED, ADD MOAR CNCT TO EVEN IT OUT)

Step 17. Press PLAY to allow things to form and what not.

Step 18. use the AIR tool on a rather low brush setting to mix things around (Everything will be LAVA at this point, Salt based Lava is the same density as all lava)

Step 19. Your Ice caps have melted and its time to cool things off, use the COOL tool to do this, on all Lava and Ice Caps

Step 20. Add drops and dollops of water over your planet to form small oceans, lakes and such. Use HEAT tool to stop it from freezing

Step 21. Decorate with plants and mountains

Post Results: I got this as a quick low quality one

http://i355.photobucket.com/albums/r465/superKoolpictures/planetdemonstration2.jpg

Awesan

I don't have this one I made, I still have the template, but its very bad and NOT circular

this game can make perfect circles just like how it does squares.