The problem is that it can’t find ndk-build.cmd. I am not sure it’s even the correct name for Windows, some tutorials refer to ndk-build without the “.cmd” extension.
This project does not, at the moment, properly support Windows building (as I don’t have any Windows box to test on), so there are a few other things that probably won’t work off the box. The one I’m thinking about is the proj.android/jni/Android.mk file, which uses Unix-specific command lines. You need to change it to use Windows-specific command lines. It was talked about here Is there are way to create android.mk automatically and here Avoiding absolute paths including headers