The app name tells it all. First, you drop a ball by tapping on the left side on the screen. The ball then rebounds off the ramp.
The goal: make that ball go straight into that pristine orange bucket! Every time you are successful in doing so, +1 points for you!
The blue rebounding line can be slide up and down to save yourself from losing all your points.
If you fail, you start back at zero :(
Try and see the highest score you can get!
Good luck!