I have a long game planned out and I finished 4 frames. It's an RPG, so the frames are big. After I made the first two, it loaded fine, but now it takes forever to run the app. Is there a way to make it just load the first frame when starting the game and then load the second after the player leaves the first? Can I build the levels separately as different applications and then make an application that will load each other level at the right time?