Draw Bridges funktioniert nicht

Draw Bridges is a game with innovative controls where you control your path by drawing on the screen.  Draw up to go higher, draw down to go lower. Would you like to jump? Make a ramp.  Swipe across the screen to create a bridge.  Close the gaps and carry the ball to the end of the level.  Try to jump as far and high as possible to get air time!  Aim for higher or lower platforms, or no platforms at all by drawing all the way across the level.