This is a 2D camera engine in scratch. You can adjust the variables to make the cat move based on the camera X & Y positions. A full explanation of the code is inside, since it makes more sense to see the code with comments that just having it explained. Feel free to leave any questions in the comments. Using this as a base a 3D engine could be developed, but I haven't done so. You can remix with it being 3D if you like.
All code is by me, and you are free to use it as long as you give credit.