I deleted the Safari browser history and started over the game. I came to the fourth island maybe, left the computer for 1/2 hour and when I came back my clues and inventory were both empty. There was no warning sign about cookie settings at start up. I will try Firefox now.
Really, really nice game! We are stuck when leaving the tower (for the first time?) and there is a light platform that takes you up into some knives and another platform that does not start (too low energy?). Any hints?