The Ducal Treasure is a fantastic arcade game. As a friend of a Duke whose favorite is collecting treasures, you will lead a team sailing to the Baltic Sea Island to search treasure in an old castle for him, and in return each of you will get whatever you want from the ducal huge collections. Arriving at the ancient castle, you find nothing but scraps of a torn picture, which must be a clue! The recovered picture drops you a hint about the place hiding the treasure, but a door with tricks locks it. You need to figure out how to open it. That’s just a beginning of the game! You have to conquer 5 levels (Of course, you can pause the game any time during the play), each consisting of a couple of sublevels, before opening the door.

Level 1: According to the provided sketch maps, identify the corresponding items in each of 6 sublevels.
Level 2: Find ten items of musicians, of chefs, of doctors, of gunmen, of archaeologists, and of captains, in 6 sublevels, respectively.
Level 3: Put pieces with rectangle holes on the right side into the convexes with numbers on them on the left side, like a puzzle. Note, every number should not be covered by any piece. Use the color get from left, and match the one on the back of number, then match the number on the left and the pass.
Level 4: Find the increasing identical pairs within the given time in 6 sublevels.
Level 5: Click on the items in the same order as demoed in 6 sublevels with increasing challenges.

source : itunes.apple.com