Sunshine: Freeware from 1/2 of the World of Goo Team
A game called Sunshine from Kyle Gabler, one half of 2D Boy, was released as part of Experimental Gameplay's art game theme and is free to download. The gameplay itself is like Phyta minus all the gloom and doom and, unlike said game, most definitely has an end. It is an (insert frilly fonts here) "Art Game" so don't expect a long experience, but do remember to don your best hand-on-chin, deep thought face and pretend you "get" the deeply profound meaning.