Lol, Trawel probably has it worse when it comes to tutorials. That's the next big thing I'm working on, in fact. But you'll get to see how as much as I can give critique, putting design into practice eludes me :)
Honestly kinda a miracle the Jar worked as well as it did without modifications. Resource loading in Java can be really finicky, but it seems like you've set up a good way to catch exceptions before it crashes anything- I usually tend to fail-fast behavior so I can narrow down the source of issues without dealing with the corrupted side-effects, but your approach worked better here.
I did name my character 'dragon', so it's funny that MythicDragon was a random chance- I actually thought it was just the boss encounter of the area!
It's interesting to me that we both ended up making a Java Text Adventure through very different core inspirations, and what quirks that gave us- for example, TI-BASIC (the calculator I mentioned) does accept letter input, but it is exceptionally tedious and space was at a premium, so all inputs tended to be one character long. But it printed fairly quickly (some people even made shooters), so I hadn't experienced the delay you associate with this stripped down style of game.