Press the green flag to start/reset. After you pressed the green flag, hold down your mouse, and put the cursor in a random place. The cat will look at it. Stop holding the mouse to actually start.
I made this all by myself. It's not complex, but it is wacky. -UPDATES v0.01 (Dec 18, 2021): The start of this project. v0.02 (Apr 29, 2022): Cat moves correctly towards the mouse; Limited speed to 10; Cat bounces more. v0.03 (Not done): ?