You can find the code for this project here.
The Rules:
Hit the button that corresponds with the lit up light. If you hit the wrong button, you lose. If you don't hit any button, you lose. The amount of time that you have to hit the correct button decreases with each successful "hit", so eventually, you lose.
Construction:

Using a soldering iron covered with aluminum foil, I melted 4 holes for the buttons and 4 holes for the LEDs. This is NOT recommended. Next time I'll use a drill. (FYI, I used my personal soldering iron for this, not ITPs.)

Attach buttons and LEDs to the appropriate inputs on the breadboard. Next time I'll daisy chain the common ground for the LEDs. and common power for the buttons to reduce clutter.

CAREFULLY place this mess into the plastic container.

Run power out of the box and get ready to play!