BumpyBall.io is a team-based io soccer game. Drop in and out of 5v5 online matches. How to Play BumpyBall.io The objective in BumpyBall.io is similar to Soccer, get as many goals on the opposing team as possible. W - to accelerate S - for reverse AD - to steer SPACE - To boost BumpyBall.io Strategy Passing the ball is the most effective way to move it quicky down the field. Try boosting right before hitting the ball to give it some extra 'kick'.