Wind Chaser was a Final Year Project from my Master Degree in Polytechnic University in 2010. It involved a brain wave detector named: NeuroSky. We use that as a indirect input and pair up with a traditional game pad controller to control a glider.
The mechanic of the game is using the concentration level to collect wind energy to fly the glider and complete the game. When player concentrates more, he then collect energy fast to help him to complete the level. Special ability also availble when the energy reaches to a certain amount of level. Overall the key of the game is to make player to concentrate to play the as much as possbile. Potentially it can help children with ADHD.