First, there's a tutorial. Not sure if it works properly as of today, but that should give you the basics of how things work.
Second, during the intro you're told the safeword is "pineapple"... and there's a pineapple button.
Third, there's a help button in-game with a "?" icon that pauses the game and lets you click on stuff freely, and it tells you what each does.
First line, in order: stand/kneel, unzoom map, zoom map, look at self, check mental state, check skills, check tasts, wait, look around self.
Second line, in order : help, save game, undo, safeword, options, load game, debug mode
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