Could I ask what shared library is missing and what linux distribution you are using? It shouldn't be hard to pack in any further missing shared libraries with it.
There are none missing, but the included SDL2 libraries are missing the version in the file name. E. g. the executable is linked against "libSDL2_ttf-2.0.so.0" but the included library file is called "libSDL2_ttf.so" and therefore it can't be found.
I'm using openSUSE, but I don't think that's relevant.