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Researches about the use of EMG in therapeutic games were performed by Brown et al. \cite{Donoso_Brown_2014} and Viriyasaksathian et al. \cite{Viriyasaksathian_2011}. EMG gestures were applied to a game for the upper-limb rehabilitation and motor control improvement of stroke patients. In the research conducted by the latter, the combination of music synchronization, biofeedback technology and augmented reality was employed to attract the attention of stroke patients since existing therapy methods are often boring thus results to lack of motivation.  Studies have been conducted about the implementation of EMG based gestures on guitar rhythm games. A virtual air guitar (VAG) was developed by Karjalainen et al. \cite{karjalainen2006virtual}  using a combination of handheld controllers and a guitar synthesizer. In their study, they implemented camera tracking of hand positions using orange gloves. A similar study was conducted by Figueiredo et al. They created an open source framework for air guitar games that has same features and also uses the same image processing methods with the VAG of Karjalainen et al.