NOTE: Wavensa is one of the fist Unity3D projects we've done, and, thus,  all source and constructs should be treated as a hacky abomination that have no instructional or other value. Thread carefully.

But for the brave instructions on how to play from sources:
Just open the project folder in Unity editor, choose "lazer" or "mainmenu" scene from Project files and press play. Simple enough.

If you want to try to play the game with the Tobii eyeX, enable "Use eye tracking" in Inspector options for Player object (and script). There is no menu option for it in the game, sorry!