Again, I was trying to write a 'Full Screen Scrolling Game' on hardware that really was having none of it. It was also an attempt to write a 'Split Screen' game, where the game had a 'map window' as well as the main playable screen.
To get both of these working on the Electron required, as ever, compromises. Instead of scrolling the whole screen, I just scrolled the top 'peaks' of the mountains and the 'sleepers' of the train track, as well as animating the wheels of the train to make it look like it was moving.
Possibly the only interesting thing about this is that I added another couple of levels and 'Kansas City Systems' then released it as 'Loony Loco', after a very quick phone call prior to a Video Game Conference.