Gary's Haunted Porch is an interactive cartoon-horror scene built with the Rive CLI, RML, Luau scripting, state machines, data binding, and a custom WGSL GPU layer. Knock on the door to trigger a tense buildup followed by a monster jump scare, a one-candy skeleton, or Boo-Boo arriving too late. The Scare Meter drives the fog, heartbeat vignette, candle flicker, trembling, and Gary's red eyes, while SPACE cuts every light and leaves only eyes in the dark.