Nice little game :)
Some Feedback: Maybe it would be cool if there was more chaos to it by increased time pressure. I think of dropping the balls onto the first wheel even if it is occupied. It is your job to decide left or right before the next ball drops.
Bug Report: Sometimes if the balls go back and forth inside the waiting pipe, they then skip all the wheels, even if the first one is free. They then drop to the most left container.