Factory Balls is a series of 14 mini puzzles in which you need to drag and drop a ball over the tools to produce the required ball.
Nicely done, Factory Balls is fun and very enjoyable… while it lasts: the game is not really challenging and is a bit short!
That being said, Factory Balls is an original game and I think a lot of fans would like to see a sequel with more levels and more randomly selected tools.
Update: Factory Balls walkthrough in comment #2 (thanks Xoke!)
Update: Factory Balls video walkthrough!