Rehabilitation of cognitive functions: executive, attention, memory, visual perception, language, after the remission of the symptoms of COVID-19. MentalPlus® will be used in order to rehabilitate the cognitive functions of patients who have dysfunctions after COVID-19. The patient will play on alternate days (every other day) a theme of the game and will be rehabilitated through its 10 themes. At the end of these 10 themes, the patient will be reassessed by the last theme of the game, comprising a total of 12 themes. Each theme lasts for 25 minutes each.