Evolving Tower Defense is the game which my team worked on for our final university project. It was an adaptation of the tower defense genre where not only did you fight off waves of enemies by placing towers along their path, you also built the path they walked on towards you.
This project has been left untouched since finishing our course to preserve our efforts during that time. A finished build may yet be a future project.
You can download the game here, but it is unsupported.