Love the grim fandango thing you have going on. Lighthearted setting, writing, sound, music, art all worked well together. I'm a sucker for train murder mysteries.
Admittedly... my memory is nowhere near good enough and I gave up on taking notes. So I kicked the wrong person off :-) That's on me. The "anybody could be the murderer" thing is neat - perhaps it could have been tighter (fitted in my memory) if only half of them were (the other half tell the truth) - but maybe that's not a good idea.