Tasty Planet is a top-down video game published by Dingo Games in 2006. The game is targeted at ages 8 years and older, and may be downloaded to Windows or Macintosh systems. It was later expanded in the sequel, Tasty Planet: Back for Seconds.
Tasty Planet is game focused on the evolution of a prototype bathroom cleaner, "Grey Goo." The levels follow the Grey Goo as it changes from eating dirt particles to bugs and leaves, and then eventually the rest of the universe. The game is arcade in style, and has both a casual mode, where players can play for leisure without a timer, and the full game which is timed and must be completed before the time runs out to complete the level. There are also 3 bonus levels called Endurance levels, which are long levels, and can take up to an hour to complete each
Source: Wikipedia, "Tasty planet", available under the CC-BY-SA License.