Hi @Datsik0903,
Before closing the game, which option are you using to save?
Try to go open the menu and save, then select the option to go to the main menu. Are you seeing the save you just did under the Load option?
If so, close the game and start it again, was the save game you were just checking deleted?
@stellarednails "New game" creates a new save game, completely independent from your previous games. It allows you to have different save games, with different Sims that won't be able to meet each other and different houses.
If you want to continue playing, you should use the 'Load' button, which allows you to keep playing a previously saved game.
From your question, I guess you are creating new save games each time you play, that's why you don't see your previous Sims - use Load button and you will see them 😉
-Mai