The concept is quite fun, I have a soft spot for train-themed murder mysteries, so the setting was a pleasure!
I found it a bit hard to get useful clues to find the bomber, other than the letters given after each station, so I did feel like most of the time I spent checking tickets wasn't really rewarded.
The controls are sometimes weird, I could almost stuck myself in a compartment at times despite being really close to the walls.
Despite all that I had a good time, and each time I lost it made me want to try again until I eventually found the criminal. Well done!