An AI coding agent called Gotcha can generate games and tools on Android phones by writing real code and running a local server. It can create games like Tetris and a 3D Angry Birds clone with features such as touch controls, score displays, and sound effects. Gotcha can also fix bugs in the game logic based on vague feedback. The autonomy and local capabilities of Gotcha make it a unique tool for developers, allowing for quick iteration and precise bug reporting.