I love the concept but there isn't a whole lot to this game. You're put in a big, albeit empty, open world with a fairly straightforward questline alongside optional side quests which reward you with scrap to upgrade your train's defense, weapon damage or speed. Once you've played for about 20 minutes you'll get the gist of the entire game. The quests are super simple, most requiring you to just walk over somewhere 300 meters away, grab an object, then return to the NPC questgiver. Charles is not very scary, he startled me a couple of times but the combat is easy enough after you get the flamethrower and a couple stat upgrades. Charles is more so a nuisance since he always shows up just when I'm getting close to another quest. For what it is, Choo-Choo Charles is nothing special, but it doesn't seem very long and I am enjoying it despite my issues.