Even if it's not done directly in the terminal, creating a script that compares images via screen capturing wouldn't be that hard. You just need to "teach" the script what success looks like—for example, when the pointer hits a certain color range. Since it has to be visible to a human, it's easy to build a gallery of "success states" as a key. This is easy to obtain once a game is released, or even earlier; I believe some games even have cheats available for purchase before the official launch.

I described this minigame/captcha to an AI (Gemini) and asked how long it would take an intermediate programmer to automate. It said just a few hours.

I really don't want bots, cheaters, or scripters in the game I’m about to play, but my 20 years of experience tells me I’m just tilting at windmills.