Managing a large number of levels with Mad Level Manager is easy! Just use built-in Level Configurator to define playable levels, hidden levels, and other scenes. You can decide which levels should be locked at the start, and even you can pass arguments to them. Do not worry about a Build Settings window any longer, it will be kept in sync!

Level groups

Your levels can be assigned to groups. You can use groups to create different worlds of seasons in your game. Groups as any other levels can be locked, and you can configure them in a way that a group will be unlocked if a player gets certain number of points for all levels in the previous groups. Read more about it.