❓ How to Play
Goal: Float the 🚢 boat from the START chamber to the END chamber by raising and lowering water levels to lift the gates between them.
Inlet valve (▲ blue, top): tap to raise that chamber's water level by one step.
Outlet valve (▼ red, bottom): tap to lower the water level by one step.
Gate (between chambers): tap to LIFT it — but ONLY when water levels on both sides are EQUAL. Once lifted, the boat can pass.
Water levels: 0 (empty) ▢ · 1 ▁ · 2 ▂ · 3 ▔ (full). The dashed target line shows the goal level.
Boat draft: the boat needs water level ≥ draft to float. Tier 5 cargo boats have draft 3 (must fill to max).
Tier 1-2: Single & Twin Locks
Equalize 2-3 chambers, lift 1-2 gates.
Tier 3-4: Long Canals
4-5 chambers in series, multiple gates.
Tier 5: Heavy Cargo
Draft 3 — every chamber must reach full.
Tier 6: Imperial Canals
6 chambers, 5 gates, master-level routing.
Stars: ⭐⭐⭐ for par move count. Use Undo (↶), Reset (↻), and Hints (💡)!