Stranded on the sea bed, you have to find and construct parts of a submarine which will take you to safety. Beware the dangers of the deep, and remember the old saying, "An eel is a friend for life". Only the most quick-witted and agile of mariners will avoid the grisly fate of Davy Jones' Locker.
Whenever you die, the game does not reset. This means that you will still be carrying all of the objects that were in your inventory when you died, and any objects that are not in your possession will remain in their existing locations. The score is also not reset. It is not clear if this is a bug, or if the authors intended this to happen.