Mhm! I love this idea. Also, no values/NumberValues and anything to make it obvious if they hit the right answer. It would be a threat if ever they got access to read codes in-game.
At least this would be a good implementation for people who don’t want their game botted and keeping things fair.
Also, as I mentioned, it’s better to have it in the main place before teleported to the main game.
This avoids them interacting with the main game and screwing things over, bypassing or ignoring the captcha GUI presented to them. Sure, they’ll be kicked out if they don’t answer within the given time,
but much of them will do anything malicious before the time runs out.