@Superku I'll try with the 'ent_createlayer' and see if it is the problem (I tried before and I'm sure it wasn't the problem ,but I'll see it again). But do you mean that if I saved my game using game_save instruction ,then closed my game and opened it later ,then at the main menu (before even loading a level or creating entities) I won't be able to load my previously saved game?

Also, concerning your talking about saving after a completed mission (I liked that) ,how to use file_ manipulation for it?