I think it is complete. If you find that I've missed something, send me an email. For a list of keyboard shortcuts within Excel, download Excel Keyboard Shortcuts . I wrote this game several months ago. You try to find targets by shooting paths into a grid, and watching whether those paths hit the targets, exit out of the grid, or are reflected back to their original cell.
Complete details are in the workbook file .
It will not work with Excel95 or earlier versions. COM Add-In written for Excel in Office 2000 Developer Edition. The actual download doesn't really do anything, so it will be of interested only to those who want to write COM Add-Ins. You must have the Developer Edition of Office 2000 to view the code. I appreciate the assistance of Stephen Bullen of Business Modeling Solutions for clarifying a few technical matters.