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Harbor Relay
Plan two ferry lines and deliver passengers on time
Each harbour has a few docks, and passengers arrive on a fixed schedule, each heading for a particular dock. Plan a one-way loop for each of the two boats, assign their seats, and set sail. Each tick, passengers board, boats move one stop, and passengers get off or transfer. If more than 8 people wait at a dock for two ticks in a row the run pauses; deliver enough passengers by closing time to finish.
The game screens are in Chinese for now. The puzzles themselves are visual, and this page explains the rules in English.
- Original
- No sign-up
- Saved locally
- Free
How to play
- Choose 2–5 stops for line A and line B to form one-way loops, then assign seats on the two boats.
- Press "set sail" to lock the plan, then advance one tick at a time, or four at once.
- Each tick: passengers arrive → A then B take on passengers → both boats move one stop → passengers get off or transfer. Passengers only board if the next stop brings them closer.
- More than 8 people waiting at a dock for two ticks in a row pauses the run; reach the delivery target by closing time to complete the map.
- In maps 4–6 loops must follow the light channels, each dock can board only 1 person per tick, and up to two docks can be expanded to 3.
Controls
Everything is buttons and lists, with no timer. Undo one tick, or confirm to re-plan.
Progress and saves
- Progress is saved automatically in this browser, so you can close the page and pick up where you left off.
- The game's own save panel can download a JSON backup. Make one before switching browsers or clearing data.
- Signed in to lyrasama.com, you can use "Account save" at the top of the game page to keep your progress in your account and load it on another device.
FAQ
Is it hectic?
No. There is no real-time clock; every tick advances only when you press the button, so take your time.
What if a run fails?
Undo a tick or re-plan the lines. Passengers arrive at the same times on every attempt, so you can compare plans.
Do I need an account or to pay?
No. The games are free, with no ads or in-app purchases. A lyrasama.com account is only for keeping your progress in your account; you can play everything without one.
Where is my progress stored?
In this browser on this device; nothing is uploaded. Clearing browser data or private browsing loses it, so download a backup from the game's save panel first.
Do you collect data about me?
Only daily counts per game: opened, level cleared, came back on a later day, and played for 5 minutes. No identity, IP address or game content. Nothing is counted when your browser sends Do Not Track or Global Privacy Control.
Another question, or found a bug? Let us know.