New hint system

Hi all,

This update introduces a small hint system because the puzzles turned out to be a bit hard. By pressing F1 or the right controller stick you will get short hints depending on your progress. These are still a bit vague just to nudge you in the right direction and not to spoil everything.

In the settings, you can now also control the volume of the music and the sfx separately.

There were also a few bugfixes and the hotkey for object reset is now F11 because F12 is the standard for making screenshots on Steam.

Happy puzzling!