Wow, I'm pretty blown away by this. Not only the mini-games to play to fix the train, but the sound design including the announcements, the atmosphere and the story / messaging. Real top notch project! Very well done!
The only critique I had was just that the mouse sensitivity for the camera was a bit too high for me personally, but it wasn't nearly as much of an issue once I got the hang of it. I really enjoyed my time with this game. Great job!