use the arrow keys to move cat and WASD to move camera Press space to toggle camera follow. Then you can also use the slider to change the follow speed. A higher number means slower following, where 1 means the camera is always directly on the player. Also try walking out of view and then turning follow on. The camera glides smoothly over to the player (which I think is pretty neat). I didn't add zoom or rotation because I didn't feel like it.
definitely not copyation I was able to make sprites go off-screen by making a large transparent rectangle around any costume that should be able to go off-screen. This way Scratch thinks the costume is really big and it creates the illusion that the sprite is going off the edge (in reality there's part of it still on the screen, you just can't see it).