Rainbow Castle

The game is based on the story by Frank Stockton ‘The Lady, or the Tiger?’

A prince must choose between two or three doors. Each room contains a princess, a tiger or is empty. If he guesses who are behind the doors, the princess is set free. If not, the hungry beast immediately pounces upon him.

I used Cocos2D-XNA. There are 4 free levels with two doors and 3 paid with three doors (more complex riddles). Designed primarily for fans of mathematical puzzles.
I plan to port the game to Android and iOS later.