This proposal outlines a mobile game called "Running Rat" aimed at 7-16 year olds of any gender or social status. The game would be a side-scrolling runner where the player controls a rat escaping a cat. It would have both level-based and endless modes, collectable cheese items, character skins to purchase, and different maps with unique soundtracks. The rationale discusses the skills gained from a previous side-scrolling advergame project that can apply to animating running characters and side-scrolling movement. The project concept provides more details on gameplay mechanics and planned features like shops, loading screens, and currency systems inspired by similar games. Evaluation plans include comparing it to other products, getting peer feedback,