This is a dangerously addictive and somewhat hypnotic puzzle game in which the player tries to turn all 16 keys to the vertical position. The rules are as follows:

Instructions
Click on the download button below and save the installer file to somewhere on your hard drive (remember where). Using windows Explorer, navigate to the file and double-click it - this will start the installation process. After installation, you will find "Lock Puzzle" in your start menu.
Requirements: Should run on any computer with .NET 3.5 SP1 installed.