Stage 4 playable slice

HoldUp!

Run the first production-directed River Race slice with four teams, twenty card holders, seeded random simulation, or the classroom camera.

Stage 4 · automated evidence complete, physical classroom gate open

01 River RaceRun the five-question, four-team playable slice with random simulator or classroom-camera input. 02 Camera DiagnosticInspect camera, marker quality, readiness and lifecycle evidence on the Imago. 03 Phone TagDisplay an official AprilTag for controlled input testing without printing a card. 04 Prototype ArchiveRead why the first Game Lab generation was retired and where its runnable source is preserved. 05 Runnable Source ArchiveOpen the frozen prototype branch on GitHub. The active product no longer imports these games.