A while ago we were contacted about remaking some flash games used for retraining patients with paralysis. 

We ended up making 5 Unity3D based 2D games and a launcher supported by an administration system, that makes it possible to make individualized exersises for the user. The exercises functions as specialized settings for the patients to make the games adapt to the patients skill level. 

The games are installed on a pc with touch screen and an external IR sensor that registers the movement of the users hand. The user configures left and right to fit their ability to move their hand.