Multiple games in one scene

Hello. So i want to run multiply games in one scene and divide them. So one game will be shown in left down corner, another in right down corner and so on. What i do. I make an empty scene and then load there my levels. But here begin a problems. Level loads on each other. And levels shown in only one camera. Also there problem with audio listener, because here is 4 audio listener. I know i can divide screen space by each camera. So its difficult.

But maybe there are another way to do this?

GUIManagerScript can be created to manage all instance at one scene. Try to code cool.