Here is the Power of Four version 1.1. The game is easy to play, but fun. (Game requires 2 people to play.)
Here are the controls:
SPACE BAR - Switch modes between mouse mode and keyboard mode.
Mouse mode - Use the mouse to select which slot, click on your checker that is above the yellow checker holder to place your checker.
Keyboard mode - Use the arrow keys to select which slot, enter/return will place your checker.
CTRL+R - Use must use these keys together at the same time to reset the board.
Enjoy!