Fun, but potentially ultra-violent, Major Beuno's Moon Waltz, gives you the power to reveal a full moon using the SPACE BAR. This will affect the state of a young man walking to the end of his town to buy some cigarettes, who happens to be a Werewolf.
You can choose to wreak absolute pandemonium upon the town, or try to be a more upstanding citizen. Hugely accessible, with a variety of different endings. My only wish is that you didn't need an additional switch to start and restart (key "R"), as this would make a brilliant pure one-switch game