With this update Rookie got a SaveSystem. It will automatically load last game on level-start and also does trigger auto-saves. On top the Player has the option to manually trigger saving and loading. But this probabbly become restricted in future again because it could become missused easily (same is valid for the end-round-option).

Also you have chance to wipe your data. But be careful with this button. Because the game will not ask you if you are sure. The data will just become wiped. Why? Because the UI is not yet final and will be reworked. At the moment I just throw everything I need on the UI so that I later will have an overview what it should support and what not.
If you want to know whats going on with the HUD then you can check out this feature on codecks: https://tomate-salat.codecks.io/decks/105-steam-ea/card/2ey-gamehud-improvements (atm its just a placedholder but will be filled over time).

So .... enjoy keeping your progress :)