Always store last puzzle

[rubo77]

Imagine, you try to solve a really complicated puzzle and suddenly the battery dies.

There should be a fallback in case the app is closed, so you always get back to the latest puzzle.

[docbensch]

A history of all riddles i solved would be great, with the possibility to mark riddles f.e. as good.

[rubo77]

For a simple start, we could add an Autosave Slot after 1 Minute

[rubo77]

Done, Autosave works in slot 1.

Todo: shouldn't Autosave if you are already playing one of the saved games

[rubo77]

there is still something odd, it seems, like you can only use the autosave function if you saved at least one time something in the first slot by hand