It appears that when I complete levels they turn into a different kind of star or planet or whatever. I'm not sure if these are meant to all be different or they mean different things based on how effectively I've completed the level.
I really love the graphics and gameplay. Pretty easy and quick though. I can see this becoming a much better game once you add more levels and maybe a story.
 "NGU IDLE"){kind=icon}
 "Hat Wizard"){kind=icon}
 "There is no game"){kind=icon}
 "Infinity Inc"){kind=icon}
 "The Valley Rule"){kind=icon}
 "Dangerous adventure"){kind=icon}
 "Learn to Fly Idle"){kind=icon}
 "Colornauts"){kind=icon}
 "Time Swap"){kind=icon}
 "Night Lights"){kind=icon}
 "Daymare Cat"){kind=icon}
 "reversi(othello)"){kind=icon}
not anymore