The problem is so few people can do even basic math in the USA that such a game would not sell well. I mean there are functioning adults in our society with nice cars and a big house with a good paying job that cannot even do basic math. Like here is just some examples:
I ask people that if I
increased their pay by 10%,
three times in a row, then what was the overall percentage increase?
The answer they give me is 30%. I kid you not NOT, this is the answer I get from them! The correct answer is 33.1%.
Or I ask them
If your original pay of $200 at the end of the week was
reduced by 20%, then how much
percentage increase is needed to get back to your original pay of $200? The answer they give me is 20%!!!

The correct answer is 25% to get back to your original pay of $200.