SPOILERS AHEAD!!!
A very beautiful game! The puzzles were quite challenging but I managed to solve them all... except for the invisible maze in the last vagon before the locomotive. I can't manage to get to the weird candelabra at the end. I suceeded to get 9 blocks from the candelabra at the bottom row but I can't get anywhere else! Am I doing something wrong (do I need to unlock something first?)? I charted the path which worked for me until the very point if you need it:
https://drive.google.com/file/d/15XRzVemQ-P9ho1kiq5G1ziigiCvSFR0c/view?usp=shari...
So, I only got the ending where you leave the train which wasn't very satisfying, thus I tried the other option. Because I'm stuck at the maze part, I can't provide any additional feedback. :-(
From what I played through, I can only recommend the game! The only bigger downside were the chases where the transition from a cutscene to gameplay wasn't clearly visible, so I died everytime a new chase came up. Fortunately, thanks to a lot of places for saving your game it didn't bring you back that much, so the story still remained pretty fluid. :-)