Simplification of the mining process

Hi i'm writing a blog for newbies getting into altcoins, trading, mining etc, i'm writing about mining at the moment and trying to simplify the process for laymen to understand
would you consider this scenario as a true simplified representation of mining and the impact of difficulties.

To simplify it, picture a table, you and 3 other people are stood at it, on the table is a 100 piece jigsaw puzzle, if you complete the puzzle you are rewarded with cake,
you all finish the puzzle, each using 25 pieces, so you are rewarded with 1/4 of the cake each.
More and more people join the table, so the jigsaw puzzle increases to 500/1000/2000 pieces and your slice of the cake gets smaller and smaller, and then the guys with 6 arms and 2 heads join the table and finish the puzzles quicker than anyone one else can, these are the farmers

thanks.