- Idea: the wooden Montessori sliding board, rebuilt as a trail through a camp
- The technique is taught first: one spot at a time, leave the finished ones alone
- The card prints the fewest swaps there are — proved, not estimated
- verify:campswap walks every arrangement of 160 cards, before anything was drawn
- Drag to swap, or tap one then tap the other — both always live
- A finished spot gets a green ring AND a tick — never colour alone
- Three, four, five or six spots
- Two players, half a screen each — and both can really drag at once
- Finishing first does not end the game — the second camp always gets set
- Two separate honours: first to finish, and fewest swaps
- Too many swaps → a torch shows the next spot, then a breath — never a game-over
- The clearing is painted, and cut to three shapes so each board fits it exactly
- The path stays drawn by code — its bend changes with the number of spots
- Two players on two devices, instead of sharing one screenplanned
✓ = done · ☐ = planned. Every game is built one step at a time like this.