Completely mouse driven. All actions are context-sensitive (click to move, click to eat). In-game tooltips will provide guidance as needed.
Some additional information:
Clothing helps protect you from the elements, without clothing you?ll lose energy quicker. Without energy, you?ll be forced to sleep and sleeping on the raft will cause you to drift further from shore. Islands are placed a days journey apart (randomly on the Y-axis) and the map is guaranteed to be stocked with twice the supplies you need to travel from start to finish.
The game is definitely challenging ? you maybe only win 1 in 3 games. Planks (aside from taking up inventory space) provide a ?scoring? mechanism (reported in the statistics).