I'm making a cross-platform game and was wondering if I draw a considerable normal size level outside my window size (In the layout area) will have any effect on the performance. All the objects might have a bullet behavior. I heard there shouldn't be more than 100 objects on the layout. What are good tips to keep in mind designing a layout which extends your viewport's area. My aim is to keep the game as efficient as I can so it can run smoothly on low performance devices.
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You should read the "dont waste your memory" tutorial, it has some info on drawings sizes, and how they affect memory and overall performance