The player's objective is to collect the lost crystals inside the Castle. To reach and gather all the crystals, the prince Lon must solve puzzles and he will need his father help to achieve his goal. Whenever he presses 'H' his father will repeat every move the Prince made recently.

The player will have to solve the cooperative puzzles by activating triggers that open doors, turn on elevators and lift up bridges. The player achieves his goal when he collects all the crystals.

The main keyboard keys are:
- Arrow keys: move the character.
- 'space': jump.
- 'H' : calls for help.
- 'R' : restarts the current level.