Cannon Basketball 4. Cannon Basketball is a combination of physics puzzler and the sports of basketball. In each level you have to launch a basketball from a cannon into a hoop. But it won’t be easy, because there are many obstacles in your way. You must figure a way to shoot around the obstacles to reach the hoop. Try to get three stars on each level. Will you be able to conquer all the levels? Enjoy and have fun in playing this free online game on Round Games.