Try to change the sliders, nothing happens yet. Click the background to play some adjustable tempo music, click the cat to meow, or press any key to pop.
Only variable slider watchers are the only one that works, but not x position, y position, size, etc. The problem for example, if you try to change the cat's x position using the slider, the slider still moves but it doesn't work, as it is supposed to make the cat move left or right.