Just relax. And press the green flag twice. Also, when it asks you how many seconds, that controls the speed. Bigger number=slower speed. Also, just type the number. Ex: "1", instead of "1 second". (No quotation marks, though.) If you type words/symbols, it goes crazy.
Update for multiple cat options coming soon! -v1.0: Released! -v1.1: Fixed original sprite not moving. -v1.2: The code is much simpler now, and you can choose any number of seconds. -v1.35: Through vigorous work, I added 3 other cats.