In order for Whack-a-Mole to work, there are a few requirements:
Once all of this is done, you can download the pre-built version of Whack-a-Mole here: WhackAMole_build_2004_04_29.zip.
If you would prefer to build it yourself, you must have Microsoft Visual Studio .NET 2003 and the Microsoft DirectX 9.0 SDK Update (Summer 2003) installed. The source is available here: WhackAMole_src_2004_04_29.zip.
Once you have done all this, extract the source wherever you want, and load
the Whack-a-Mole solution file (WhackAMole.sln) in VS .NET. Make sure the active build
configuration is Release, and rebuild the solution. Then, you can either run
the program directly using
bin/WhackAMole.exe (under the directory where
you extracted the source), or you can copy the
directories to a different directory (preserving the directory structure) and run
WhackAMole.exe from the
bin directory there.