Just played it a little, nice game! I recommend you also provide libjpeg.so.62 though since my distro (Arch) comes with libjpeg 8 and other modern distros will as well.
I especially like the consistent graphical style you went for.
Is there any reason you chose premake? I haven't worked with it yet but from the looks of it, its features and purpose is mostly that of CMake. If you have used both, can you provide some insight why you went for premake?
I congratulate you on making the game and its assets GPL3. I think I might be snatching a few bits of it for my own projects soon (GPL3, of course).
Is there a reason you are not using a scripting language except for the build script?
You are using mixed CRLF line endings. Try to keep it to just LF so vim doesn't show weird symbols.
All in all good job, looking forward to any further development.