This looks really cool! but I did want to give some of my thoughts
-The speed and scale seems to be really far off, and the really narrow tracks don't really help that feeling
-Using more normal controls is good, but it would probably be good to have 'traditional' Densha controls available, and also allowing people to hold down the keys to add more brakes or throttle rather than having to press down each time
-It feels less like stopping precisely is a game of skill as much as luck, given how quickly the train decelerates, and the fact you cannot see your distance in cm, but are scored on cm distance
That said I really really like the way it looks and I'm really looking forward to seeing another Densha clone >:)