You're trying the old primary school method of testing things based on the wrong criteria. Why does it need to play tic-tac-toe, hangman, or rock paper scissors? Why do you think a language model would be good at those things?
Similarly, why would you expect a thing trained on the context of text would be good at reversing strings? It's amazing it's as good as it is at these things because it doesn't really make sense that it could do these things unless they trained it on reversed strings to add diversity but it's hard to gain context from a string backwards.
ALSO: your transcript doxs you and is hard to tell where your messages end and GPT begins. Just a heads up in case you don't want your full name leaked to whoever reads this