For such a simple game man do I love this. For one thing PICO 8 games are always great. Also, the updated form of the prisoner's dilemma is interesting, as the prisoner's dilemma is majorly based in guessing what your opponent will do, now you also have to guess their confidence in that answer.
To criticize I have two pointers:
1. The game does not explain much. I was able to figure out that pre-move earns more than remove, and that remove will always diminish the size by 50%, but these numbers could also be displayed on the screen in more ways than just how many points you receive. something like a "REMOVE: 50%" pop up that does the scrolling effect that the constants do would be nice.
2. The AI at times seems a bit too random, it feel like it would benefit from a more challenging AI, or even a "pass the device to your friend" style multiplayer where two people can participate in this game with one another.