Windows releases are available for download and here are GNU/Linux compile instructions, you will need to have irrlicht installed:
svn co https://formularetro.svn.sourceforge.net/svnroot/formularetro/trunk formularetro
cd formularetro
find . -exec sed -i 's|../irrlicht/include|/usr/include/irrlicht|g' {} \;
make
./dist/Debug/GNU-Linux-x86/formularetro
If you like the art style, you might want to give SimCar a go.
PS: I recorded a short video of the action and found out that the art license (CC-BY-SA 3.0 ES) is compatible with the international version of that license.