I really enjoy console games where you and a friend can control multiple characters at the same time, or you can switch through characters while playing. I adapted that idea to Scratch here. Press C to toggle between control of the camera and of the four sprites. All four arrow keys to move. You can tell which sprite is being contolled by the "cam" triangle at the top-if it's attached to a sprite #, you are controlling that sprite. If it's a rectangle, you are panning and not controlling a sprite. It's not very polished but I wanted to throw it out there...before someone else did. Scrolling by Archmage, adapted directly from his "Efficient Scrolling Demo."