gcc snake.c -lpthread

1. snake_windows.c file is the code using windowsapis and can be built directly

2. snake.c please use POSIX Threads for Windows

please use MSVS or GNU GCC (e.g. MinGW or MinGW64(without win32pthreads)) supported for pthreads4w support
gcc snake.c -I${The Dir of pthreads4w}
replace ${The Dir of pthreads4w} according to your own setting

3. snake_windows_opt.c is the version avoiding refresh all output frequently, which lead to splash screen