The cat on the top multiplies its movement by deltaTime. The cat on the bottom just moves 20 to the right. Scratch's frame limit is 30FPS. Turning on the `frameLimit` variable simulates a frame limit of 15FPS. When it's on, the cat at the top moves the same rate regardless of FPS, however the cat at the bottom moves 2x slower than normal. Because no computer is perfect, even without the frame limiter, there's a bit of variation between the cats which are supposed to go the same speed.
