I just tried it an wow that is frustrating lol. It worked with a previous version on GPT 4 (but not nearly as well as opus)
Anyways, the issue it had when I just tried it is that it refuses to actually read the file without explicit instruction. So try telling it to read the document you uploaded (it's encoded in a way AI can easily read without any help). Once I convinced GPT-4 to read the file just now it started the game. But it took a few message reminding it that it, in fact, can read files.
This should work, but I still want to emphasize how much better Claude performed. I know you said you can't get it in your area yet, but now that I'm playing on GPT again it does no justice to the game. So when claude comes to your area try to remember this exists lol. In the mean time I want to set up the API so people can try this in other places, but it's too expensive at the moment