Using a Panel named "_PS_DEBUG_" and a Debug Clear Button (See "Game" page script) to assist with debugging a script.
Example using visibility control and image assignment (Buttons have images with indices of 0 and 1) to display game board. Visibility is toggled between Buttons and Panes for a particular cell based on user selection.
Example of using a RESOURCES page to house common images that you then load into buttons/panels on the active page.
This version has all 3 backgrounds color-reduced to 64K colors. This change basically dropped the file size from 3MB down to just over 1MB with no real noticeable difference.
As was done in Pronto Pong, I've also provided a 63x76 button that you may use on a Home Page to access the game. Enjoy!