for instructions, you will need to do the most simple thing to make your cat go forward, press the right arrow on your keyboard, to go in reverse, press the left arrow, to go back to going forward, press space
making this scratch game was not hard, just choose a sprite, choose a backdrops, and get going, the only code blocks you need to use to make a game as simple as this are the events and motion code blocks, for example, the sprite will take one step when you click space