This game is just satirizing those games that call themselves impossible but actually have a way to progress and beat them. This game actually is impossible (there's not victory condition).
I was able to click on it due to load lag that made the square not change to the circle right away. Though it isn't impossible, now I will sue for the two seconds of life I wasted and get a whole $5 from it so I would get a reward for it ;).
I wouldn't categorize it as a game anyways. If that is a game, then hover links are games too. Though they give you the reward of taking you to another site.