Great game, and fantastic use of using real life for this. However, I'm very disappointed at the fact that I don't really know what I'm doing to actually solve the mystery of Uzoc or whatever the riddler's name was, or what the grandfather was trying to protect. I feel lost all the time in this game, and it's an absolute pain in the arse to keep going to a lighthouse and not being able to enter it. I always expected something out of finding a mere symbol near it. And the lore of what the journal hinted at really made me excited to explore the island (whose name I still can't pronounce) until I found myself constantly looking over every nook and cranny of each lighthouse.
What I'm trying to say is that this game really needs a walkthrough.