Click the green flag and watch the magic unfold. While viewing, set the slider to 0 if you wish to see the actual block, or 1 if you wish to see the workaround.
HOW IT WORKS: There are four hidden sprites. Each one is pixel-thick and corresponds to one edge. (It uses the ghost effect rather than the hide block so it can still be sensed. Click the stop sign to reveal them.) When the Scratch Cat is touching one of the edges and is facing in a range towards it, then he bounces off.
