This is a simplified version of an old game. The goal is to move the player (the X) to the empty square (the blue one). Click on a square adjacent to the empty square to trade spots. Keep trading spots until you are able to work the player square to the upper-left corner.

ASSIGNMENT:

Alter the sample project in the following ways:

• Increase the number of squares to sixteen.
• Arrange them into a 4x4 grid.
• Make it so that an error resets the grid, forcing the player to start over.