You don't need a template at all. If you want a game that automatically sidescrolls, here's what you do: Create all your actors like normal, with all their behaviors and rules. But then create another actor. It should be the height of the screen. Tell it to move automatically and give IT a Control Camera Behavior. Then, under its Graphics tab, uncheck Visible. Finally, move it a good distance offscreen. Now, make sure your Player(s) 1/2/3/4 Character(s)can collide with it. So now, if they're lagging behind, you can set up a rule that the player character collides with the barrier, they can lose a life/health/magic/WHATEVER! Hope this helps.
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But i am not a coder.