Geometry Bounce

Geometry bounce is a minimalistic game with one easy task. You have to keep the ball on your screen. Drag your finger on the screen to create a wall and bounce the ball away. Does this sound too easy? With each bounce, the ball will go faster and faster. Do not worry though, there is still a chance to slow the ball down, but only if you manage to lead the ball to a slowing pentagon. How many bounces can you get?