User-Centered Design of a Replayable VR Game for Children with HCP.

Hemiparetic Cerebral Palsy, a form of Cerebral Palsy affecting one side of the body, limits physical activity, as children tend to rely on their less-affected hand. This condition significantly increases the risk of long-term health issues. Immersive Virtual Reality (VR) games have shown potential to improve mobility; however, existing systems often lack varied stimuli and sustained engagement. This work explores the use of Procedural Content Generation to enhance engagement by dynamically generating replayable game content. A user-centered design process, informed by interviews with four experts, guided the development of an immersive VR game that promotes physical activity and upper-limb mobility. The prototype integrates Pseudo-Random Number Generators and Markov chains to adapt object spawning and maintain variety. A pilot study with 24 healthy participants evaluated usability and user experience, showing high enjoyment and ease of use, while highlighting the need for clearer goals, social interaction, and achievement elements to further improve replayability.