Update (with Python 3.7 compatibility) is on PyPI & GitHub
The files here pin/bundle the Pyglet dependency, which is not compatible with Python 3.7+.
An update is available on PyPI:
pip install jrti-game
Or on GitHub: github.com/encukou/jrti_game
If the game does not run for you (on Python 3.6+), you can let me know via a GitHub issue. (I'll be happy for other bugs as well, but I don't promise to address them – this game was a week-only effort.)