I play SPARC now its two days and have both times woken up with aching muscles in my shoulder. Despite its small size, it's a lot of fun. The graphics are simple but match the game very well. The motion traking works smoothly and problems with the connection to the game did not occur with me either. The only thing that could cause SPARC to fail is the very limited player base for VR games, which has already become the fate of some good multiplayer titles.