This paper describes the design and implementation of an interactive system that integrates a motion-sensitive embedded controller with a 2D game engine. The solution is based on an ESP32 microcontroller and an MPU6050 inertial sensor, using a real-time, task-oriented firmware architecture and Bluetooth communication. Orientation data are mapped to screen coordinates through linear transformations and processed by geometric algorithms for collision detection and shape manipulation in a Python/Pygame application. System-level tests indicate adequate responsiveness, stability, and precision, supporting the feasibility of the proposed low-cost architecture for gesture-based human–computer interaction experiments.