3 days, 30 puzzles: A journey to the magic island

Gladys Patrick, Kelly & William Carter and Jacob Thomson are best friends who unknowingly and unwillingly had to set a journey to the castle of magic island. They have 3 days of time to solve 30 puzzles and get through the doors of the castle. They have to get through the last door and there is a secret waiting for them. If they fail , they will be trapped in the magic Island forever. Will they be able to get through the doors and find the secret of the magic island? What is the secret that is waiting for them?....