The listing, Chains (Steam Key) has ended.
http://store.steampowered.com/app/11360/Chains/
ABOUT THIS GAME
Chains is a challenging puzzle game with a unique feel and distinctive vector graphics style. The object of the game is simple - to link adjacent bubbles of the same color into chains. As you progress through the physics-driven stages it becomes increasingly more challenging and players' speed, strategy and skill will be put to the test.
20 levels each focusing on action, strategy or flow
Physics-driven gameplay
3 difficulty modes
Colorblind option
Up to 15 player profiles
Unique art direction with beautiful vector graphics
Soundtrack from the Belgian electro band Silence
Unlimited replayability value