To install Xwii just download the .deb provided, double click and put in your password.
The above method only works for Ubuntu or Ubuntu based distributions.
If you are using something else you need to do the following:
Install these dependencies:
libbluetooth-dev
libxtst-dev
freeglut3-dev
cl-sdl-opengl
build-essential
cd Desktop *(navigates to your desktop)
cd xw[PRESSTAB] *(press tab to autocomplete the full folder name)
make *(compiles the program)