Hi,
I did some work to build 64-bit Supertuxkart binary for Windows using MinGW compiler. As far as I tested, it's working fine. If someone is interested in it, here is the README file:
https://github.com/supertuxkart/depende ... README.txt
And dependencies are available in our repo:
https://github.com/supertuxkart/dependencies
I should be able to compile 64-bit STK using Visual Studio too. Probably I just need to replace all .dll files by .lib files in dependencies (which I have already compiled). I will try this in next few days