Cut the ice to make the vikings fall to their boat so they can go back home! A little map shows the viking's positions (they are shown as yellow dots). You can also cut the ice when you're on board, to help the captain to free his men. The game includes 40 levels of increasing difficulty, but only 5 of them are available when you start.
Click, drag and release to cut the ice. Arrow keys to move along the scene, if its wider than the part visible on screen.