I tried to play this, but I got stuck at a dialog box constantly popping up saying "Excuse me, sir! I'm afraid this is first class."
I restarted, and was able to get into the second wagon, got to the murder part, fetched two items, and didn't really know how to progress beyond that.
Definitely could've used some sounds and maybe a chiptune, but I really liked the graphics :) For so little time spent on the game it's a really cool start!