This document presents the results of a study evaluating the effectiveness of the game Mecanika in teaching Newtonian physics concepts. Key findings include: 1. Students who played Mecanika showed a 9.2% gain on a physics concept inventory, compared to a 1.9% gain for the control group. 2. Playing more levels of the game was associated with greater learning, suggesting a focused impact. However, the game may not replace teachers. 3. When integrated into classrooms, students maintained over 70% of gains one month later, but teachers' implementation quality may have varied. 4. While boys found the game more fun, there were no significant gender differences in learning