by moving right. the char or object can only move right? ok i get that.! but are you allowed to have up and down movement aswell but just not left movement.just want to get my facts straight :D

I think he meant a system like the original Super Mario Bros, where you can move right, but if you move left you are blocked by the edge of the screen.

But, as he said, you can twist this rule in whatever way you feel best suits your game.

Exactly! I thought about something like in Mario as gamible said ;)

ok yeah that was my thoughts aswell. thanx.just wanted to know exactly what must be done. :D

What if my character moving only left, not right? Did I'll break the rule?

If you'll explain why and what for (and maybe something else will move right) it's ok :)

His game camera might move right :P I think the rule prefers your main character to move right.