A sandbox game project with a grab bag of systems and examples: a start menu and HUD, multiple player controllers and movement modes, physics prop grabbing, a spray decal tool, and a suite of configurable HUD crosshairs. Under the hood it ships a virtual-DOM style UI toolkit (Goo) with SUI document generation, icon fetching and caching, animation helpers, and various utility components for vehicles, ragdolls, and input tests.