Recognizing and expressing emotions are some of the challenges experienced by individuals with Autism Spectrum Disorder (ASD). Therapy is often used to help children with this neurodevelopmental condition, to improve their emotional and social skills. Our focus is to teach emotions to children with ASD, in order to improve these abilities, by developing a mobile Serious Game and a Facial Emotion Recognition (FER) model to integrate in it. This application offers four main activities: a learning activity, two recognition activities and the imitate activity, which integrates the FER model, and were designed following indications from experts in the field.