### Related Work
Motor impairments such as coordination problems, reduced speed or accuracy, as well as cognitive or perceptual impairments should be addressed and improved by the games. [PERSON] et al. [19] investigated serious games for the assessment and rehabilitation of patients after a stroke based on a platform to support ankle rehabilitation to support dorsiflexion movements and muscle strength. Within one of their games, moving food items need to be collected. The results showed that their proposed platform can be used for the rehabilitation of ankle movements. Within another research study by [PERSON] et al. [20], a therapy strategy that uses a combination of mirror therapy and robot-assisted training with a serious game where a plane needs to be flow through rings in the air was shown. After six sessions with one healthy participant, the results of the method favored active ankle plantar flexion range of motion (ROM) and muscle activation, also increasing the ROM. [PERSON] et al. [21] developed a mobile RehApp application that uses augmented reality (AR) to stimulate movement exercises and is intended to provide therapeutic support during ankle sprain rehabilitation. Its primary objective is to aid both physiotherapists and patients in their rehabilitation process. A custom-made AR marker is placed on the foot enabling the camera of a tablet to capture the movements. Within another research study by [PERSON] et al. [22], serious games in robotic ankle rehabilitation were researched. To do so, an active ankle-foot orthosis was used, which can be configured to perform exercises to improve patient skeletal muscle strength regarding two ankle movements (dorsiflexion and plantar flexion); e.g., within one of their games, small creatures emerge on the screen and the user, controlling a foot, must eliminate them by meeting the specified strength requirements set for the patient. The outcomes indicate that the suggested games can be successfully employed in robotic rehabilitation. A similar target was researched by [PERSON] et al. [23] in the field of clubfoot rehabilitation using a serious game (moving a car and avoiding obstacles). The game is controlled by a self-developed device to capture foot movement patterns for dorsiflexion and plantar flexion. The results showed good acceptance by the two involved children. One approach for knee rehabilitation is the serious game called \"Fun-Knee\" [24], which was specifically designed to aid the rehabilitation of patients who have undergone knee prosthesis implantation. The game incorporates a fishing task, known as the heel slip exercise, to make the therapeutic exercise more enjoyable and engaging. This exercise is commonly prescribed during knee prosthesis rehabilitation to enhance knee joint flexion movements. To capture the required movements, the patients wear a knee sleeve equipped with various sensors. The captured data is then transmitted to a smartphone via Bluetooth, and the serious game is displayed on the smartphone screen for the patients to interact with. An exergame called \"MoveYourFeet\" [25], a mobile application specifically developed for performing ankle joint exercises that target dorsi-extension and plantar flexion, was researched. The system is composed of two wireless inertial measurement units and a mobile device. The game itself is designed as a side-scrolling game that responds to the user's ankle joint movements, allowing them to control the game by stretching and bending both ankle joints. [PERSON] et al. used MetaMotion in a study to assess posture adjustment [26], showing that such a solution is comparable with a video-motion-capture system and can therefore be carried out in a more accessible, portable, and cost-effective way.