Demo 3: Tumble Tower — docs course (physics ladder) #238
Description
Goal: write a course that teaches deterministic physics in Echo in stages, using Tumble Tower as the running scenario.
Deliverables
- Course index + staged modules aligned to the physics ladder.
- Verify steps for each stage (fingerprints, replay, bisect on mismatch).
- Clear discussion of what makes physics determinism hard and how Echo approaches it.
Acceptance criteria
- A motivated reader can implement/modify the demo and keep it deterministic.