Played to "NaN 0" rate of growth, "NaN 0" atoms, and "32.0 multiplier, NaN 0 cost to upgrade" and then the game stopped. Last time I played, I got nearly this far and it went to exponentially negative numbers (see other comment for that screenshot). Awesome game, but I think it just fails to compute after growing a certain amount.
http://i.imgur.com/dGHwDxp.png
It says you can play to infinite size, but I got to the point where I kept looping between the different "0" units while maxing (prestige 1000) every thing repeatedly.... Super Nova would give atoms in units I can't even fathom, and it would only take 3-4 minutes before maxing everything 10x over and supernova-ing again. Finally, after about 15-20 minutes of mindblowing growth, a "max" upgrade resulted in NEGATIVE growth!! As shown below, I broke the game from too much growth, guess that's a sign I spent too much time (hours) on this one. 5/5 for an idler, funnest one I've played, thanks!!
http://i.imgur.com/enG2PxJ.png
Haven't played in awhile and came back to find all my decks and stats have disappeared, and I can't even make a new deck because it continuously gives the error "nouser"
A shame, really. This was a great game.
Nice! Great concept, I like what you've done with it so far. Keep it up! Maybe for the harder levels you could start including sideways gravity with A and D and, as it gets more complex, maybe a gold line at the bottom of the square when gravity is down, at the top when gravity is up, and so on. Basically something to remind people playing what direction gravity is in when they hit the button.
Just some ideas, probably useless but it is what it is. Keep it up, you've got a good one on the way!
 "Fisher-Diver"){kind=icon}
 "NOVA"){kind=icon}
 "Kongai"){kind=icon}
 "BackDoor- Door 2"){kind=icon}
 "TEST (Alpha)"){kind=icon}
 "Learn to Fly"){kind=icon}