It's a very simple game; when you press start, you set the difficulty (1, 2 or battles), and when you start, you just have to run away from the cat by putting the mouse pointer where you would like the real mouse to be, and survive for 180 seconds. In battle mode you can hurt the cat (pressing space), that has 800 life points. The mouse has 100.
This is game #3 in the 4 Simple Games Legacy Edition pack! v1.2