Professor Treasure's Secret Sky Castle

That dastardly Professor Treasure is at it again! This time, he's stolen all the world's treasures and hidden them away in a secret floating castle! As an intrepid treasure hunter, you and your friends have finally managed to track down the castle. However, another team of explorers is already here! Professor Treasure's Secret Sky Castle is a competitive puzzle game in which you and your opponent race to find keys, unlock treasure chests, and collect priceless treasures from around the world and history! Send out your team of treasure hunters, each with their own unique way to explore the castle. But beware! Your opponent will try to thwart your plans and grab the treasure for themselves! —description from the publisher