This is the github link to NGDK https://github.com/Kannagi/NGDK
There can be found the discord server and the creator is active in answering question.
Also the solution to the problem of green screen by the time Blastar gave more information probably found and fixed.

What I mean is that if we do not help the developers they are not going to find solutions to problems.

Also the upper screen tearing probably is a problem I created in the code of the game. Now fixed.

The problem is that NeoSD and NeoGeo as console or consolized remains expensive.
So in this case as the creator does not have a NeoSD he cannot test the SDK on an actual NeoGeo and he relies on MAME.

I do the same thing.

I have seen NGDevKit but NGDK was more aproachable. I personally believe that user expirience (of any SDK or framework) is of high priority. What I mean is that a higher abstraction makes the expirience better and gives the game designer - coder more freedom to bother with the gameplay coding.

I am uploading now the latest .neo file.

With all the fixxes and with sound (not all the music tracks and in low quility).

Please test.