Even though I didn't find it overly difficult, I enjoyed this short puzzle game (less than 5 hours to complete). Ideal when you want something to play but not something overly mind-taxing, and the soft background music is wonderfully relaxing. I'd also recommend this as a game for children, especially if playing with a parent. Even if the puzzles are a little over their head, they can always help find the stars and relics that are hidden on each island.
