A narrated cautionary tale in 24 scenes, 89 beats. You talk; each scene reveals one beat at a time. About 17–19 minutes at a steady pace, or roughly 14 with the four Optional scenes skipped (amber ticks — press S to jump one).
Most presentation clickers send PgDn / PgUp, so they drive it without setup. Click the right side of the screen to advance, the left edge to go back. Amber ticks in the bottom rail are the optional scenes.