We have generated a framework for the application with the Application Wizard.

We added the classes Square and ColorGrid that keep track of the game grid.

We defined the document class. It holds the data of the game and keeps track of when the game is over.

We defined the view class, it accepts keyboard input and draws the figures and the game grid.

The Figure class manages a single figure, it keeps track of its position and decides whether it is valid to move it into another position.

The Figure info files store information of the seven kinds of figures.