I don't either - the shaders are fine, and there should be nothing linux-specific to break them.  In fact, it should die on error loading the shaders if there were a filesystem issue, but it hasn't.

This is my first attempt at exporting SDL and I seem to have blundered.  If I had ever tested it on any PC other than my own I'm sure it would have been caught in time...  Oh well.  I didn't really make much progress since the first version.

I get what you're saying about it seeming like a fishy executable since I didn't use any engine.  Dunno what can really be done about that other than using an engine (which I'd rather avoid -- I'm too dumb for object oriented programming and 20 levels of abstraction) or compiling to WebAssembly and letting people play in browser.  I'll keep it in mind for next time.

That's really frustrating, seems most likely to be missing a DLL that I have in %path% which allows it to run on my machine, or 32 bit vs 64 bit error.  If I can figure it out, I'll reupload. :/

Edit: I was missing a dependency.  This may or may not allow the program to run.  If you like, please give the new upload a try.