This team did a lock based on a dial, much like a gym locker or “Master” lock. They took the Spring 2015 lab 4 in a direction nobody anticipated, and added a servo to open a box when the right combination was dialed in. There’s a lot of great build tips here for putting your project in a beautiful metal case. This team also went off the grid with their OWN WordPress site, here’s the link with a video, code, and more:
See the Simon game being played. Not only do the lights function as controls and indicators, but you will see the team put Simon in “Display High Score” mode by a button press sequence. There’s the ICE-3 debugger sticking out of the base.