Find your way through the labyrinth and search for the treasure.
Click the banners around the map to open the walls behind them.
To finish the game, simply step on the treasure after you've found it.

Movement:
Forward/Backward: [W] / [S]
Turn Left/Turn Right: [A] / [D]
Strafe Left/Strafe Right: [Q] / [E]
Open Door: [Mouse1]