Factory Balls 3 is even more step-by-step puzzling fun - Time Waster
Factory Balls 3 is the latest in the series, and it's more of the same frustratingly good puzzle fun. Drive yourself mental as you re-trace your steps to create Pac Man, flowery little terrarium spheres, deceptively difficult geometrically patterned balls, and more.
You've got a limited hopper of balls, so proceed carefully. Once you run out, your game is done and you'll have to start over from ball one.
You may want to wait until you get home to try this out -- your coworkers probably don't want to catch you playing with your balls.