Tap the game to open it fullscreen. On a computer, Esc exits; on a phone, use the ✕ button.

How to play

A plank slides from side to side. Tap to drop it onto the one below: whatever overhangs is cut off, and the next plank is shorter. Stack ten planks to close the hull. If a plank falls completely off, you start over.

The story behind it

The Oseberg and Gokstad ships were built of oak, with overlapping riveted planks, the technique called “clinker”. The stacking mechanic is the game’s invention. Read the story in The Oseberg and Gokstad ships: two Viking boats buried with their dead.