The McKinsey Imbellus Game is just one component of the overall assessment process. While your performance in the game is taken into consideration, it's not the sole determining factor for a call back. The written report, investigation, and your overall performance in the cases are also important aspects that are evaluated.
My advice would be to focus on highlighting your strengths and achievements in the ecosystem part of the game during any follow-up communication or interviews. Emphasize your ability to analyze complex systems, think critically, and make effective decisions within the given time frame.
Additionally, take the opportunity to reflect on your experience with the Redrock study game and identify areas for improvement. Consider what you could have done differently and how you can enhance your skills in those areas. Demonstrating a growth mindset and a willingness to learn from your experiences can be valuable qualities in the hiring process.