The easiest way to install is to download the pre-compiled package for your system from: http://www.wordsearchcreator.org/downloads/
Follow these instructions if there is no package available for your system or you want to make changes to the source.

To compile ensure you have QT 4 development files installed then run:
qmake
make

You can then run the application with ./wordsearchcreator or wordsearchcreator.exe .

To install on GNU/Lunux run as root:
make install
update-desktop-database
