Room engine

Have you ever heard of gamemaker? It's a software for making video games and it has this feature called rooms. Gamemaker rooms is essentially a way to put multiple projects into one game and travel between them with code. So, if you make a game for example, one room could have the game menu, and when you press play you go to another room with the actual game in it.

Room engine puts the convenience of rooms into snap to make it easier to code complex projects. You use a block to establish what sprites are in what rooms, and then a "room master" stops the sprites in one room and starts the sprites in another room you want to go to. Very cool.