Soko-pirate (Sokoban)

Help pirate to clean up the mess at the bilge! Just push the boxes to hide defiant skulls. The boxes can take awkward positions blocking free passage or being piled up. Sometimes in order to budge them you need to get on the other side, even not on the shortest path. The skulls are scattered randomly around as well. So do it! Clean up the mess at the bilge, hide all the skulls! :)