ok this ones a bit sci-fi
But what if you were to make a game which changed the meaning of life, the way we look at life right now isnt the same after playing the game. It gives you immense feeling that maybe you're just binary or maybe just a simulation or anything of that sort (just dont make it cliche and make it more unique. A thing which have never been thought of as a possibility) but yeah change the meaning of life (sci-fi) is my game idea :)