Give the whole boat room to leave
Paperboat Harbor · A practical starting point

The rule to keep in mind
A boat leaves toward a matching exit only when its entire moving body has room. Some boards include shared locks.
Start with the constraint
An open cell in front of a boat is only the beginning. The entire boat must travel through clear space to the matching exit.
Make one useful change
Removing one boat changes which lanes are open. Recheck the neighbors before switching a lock again.
Keep a way back
A lock is shared by boats using its passage. Plan which departure benefits from the current position before changing it.
Controls and a safe pause
Tap a boat or use Items. Arrow keys select and Enter departs. U undoes, H requests a hint, Escape opens the menu.
Open the game’s menu to pause and find its save tools. Save a backup before clearing browser data. If a step feels unclear, return to the rule and the current goal rather than rushing.
Play Paperboat Harbor