I love trains and my attention was grabbed immediately when I spotted the title and main picture.
Very cool idea for a game. Totally worth pursuing on-going development.
Graphics are good, keep it as is. (great choice in visual style and props) wasn't expecting it. Mechanics showed no problems. Able o play it without any tutorial, very self explanatory.
Sound at this level of development always needs time and lots of work, so I will hold my comments on that.
Loved the idea. Be proud of yourself, this was fun and is a great idea to pursue.