Parkinson's disease (PD) is characterized by tremors, bradykinesia, weakness, loss of postural reflexes, gait problems, and loss of dopaminergic neurons in the substantia nigra. Although there is no cure for PD, there are several efficient treatments to help with daily life, one of which is physiotherapy. Physiotherapy can help minimize the progression of the disease and improve the patient's quality of life. However, conventional physiotherapy treatments are often seen as repetitive and discouraging for patients, affecting the effectiveness of the treatment. To avoid this problem, new treatment practices combined with physiotherapy have been scientifically developed, such as the use of virtual reality (VR). Therefore, this work presents a VR computational application to assist in the physiotherapeutic treatments of patients with PD using interactive and customized 3D virtual environments. The application was evaluated by the researchers involved in the project, using a usability questionnaire specific to this type of environment, obtaining a final average of 4.77, standard deviation of 0.35 and a 95% confidence interval between its upper limits and lower (4.46; 5.08), being considered suitable for testing on real patients in the future.