I've created a git repository for my Shippy 1984 changes. This is based on the 1.3.3.7 version used in Fedora. All fedora patches are applied. It includes support for SDL2. Which means fullscreen expands to the entire screen instead of just putting the regular sized screen in the middle of a black screen.
As mentioned in another thread, there is complications in making a release. I compared 1.4.1 to 1.3.3.7. The gameplay is exactly the same. There is a shader. I haven't tried that version so I don't know what effect the shader has.