I am pretty sure the game was on an [iMac G3] around the Year 1998 to 1999.
It was a children's puzzle game which a bad robot (I think) in the middle of the screen and you have all these blocks around him, if I remember correctly, the aim was to pick a block and then answer a general knowledge question and you would occupy 3 or 4 blocks in the direction you wanted - the goal was to trap the robot by creating a perimeter around him. You would also sometimes activate a mini-game when clicking a square and the robot would say "I challenge you to a duel" then you play a fun minigame or something. And I believe if you got the enough questions wrong, the robot would go out of the perimeter and you would lose.
I hope my explanation helped.
Thanks,
Bokiz