Clone of the game called 'Filler'
But much less interesting due of different physics: thermodinamic temperature is smaller, gravitation is much higher, friction is very small, different masses (i.e. density)... And because of this it's much simpler and not so interesting!
Sum: choose your physics model more accurate.
 "3D Logic"){kind=icon}
 "doggnation"){kind=icon}
 "Math Attack - The Revenge of the numbers"){kind=icon}
 "BioLabs: Outbreak!"){kind=icon}