Pop

In a dark, grey world, little dots work in a factory, they never laugh and are sad. But one of the dots discovers that there is a blue sky and bright light above the factory's haze. He builds a cannon with which he shoots the dots high into the air so that they see the light and the colours, come to life and become colourful again themselves.

Source : https://web.archive.org/web/20160627151608/http://www.gameculture.ch/2011/10/pop/ (Translated)