Implementing autosave, or a button to save the progress up to that point

[MagicalDrizzle]

Unfortunately the game has been being pretty unstable on my machine recently, and everytime it crashes I find that my progress has been reset; it seems it only saves the game when you actually close it manually, and not if it crashes unexpectedly
Is it possible to implement a save button and/or an autosave function?

[AMDmi3]

The game autosaves on exit, if it crashes that should be fixed instead. Unfortunately you haven't provided any details.

Additionally, periodical autosave may be useful to add.