watch the cases carefully before selecting your case, proceed to open other cases to narrow down the options of the true value of your own case. You will occasionally receive the offer to sell your case for the average of the remaining values on the board. press the deal button to take this offer or the no deal button to deny it. when there are only 2 cases left and you select the no deal button. you instead receive whatever value is in your original case.
Found this old project in my old files from a few years back so I might as well share it. Added limbo keys theme to spice things up. Limbo theme: https://www.youtube.com/watch?v=8vc2YoLWM0c
