any chance of a .pocket file to play this ?
It's not something I'm likely to get to any time soon.
However! You can try building it yourself, as the source code and all assets are available. It is a GBS 2.0 project so it won't work in GBS 3.0 for easy Pocket export, but you could try to put it into the version of GBS 2.0 modified to export to Pocket instead of GB, and that will hopefully work.