Wargaming interview questions

I applied online and was given an assignment to complete the following day. The assignment was a 2D game and i was asked to implement features to it. The actual description of the assignment were two very short sentences that said; - "Make changes to impress us" - "Take however much time on it that you feel comfortable spending to produce something that demonstrates your skills." The recommended time to complete this assignment was 2 weeks. I responded back to the email explaining that i have already demonstrated my skills with the several projects available on my portfolio that i sent with my application, and for this reason i would not be completing a 2 week assignment to further demonstrate my skills. However, I mentioned that i would be more than happy to complete another exercise to test my knowledge pertaining to the language they use (C++) and programming skills in general. The Associate Recruiter i was dealing with disagreed, and said that my portfolio DOES NOT demonstrate my skills (Gameplay Skills in particular), because the projects which showcase my gameplay skills were created using C# and not C++. The recruiter decided to not proceed with my application.