I think most of those games are still too good to be reduced to clocks. SMB combo carts? Sure maybe. The thing is, turning something into a clock is one of the easiest crafty things you can do. You buy a cheap clock mechanism, drill a hole, screw it on, put the arms on, done. As many as they have up for sale, they probably have the process down and I bet it doesn't take them more than 10 minutes to make one of these. Hell, driftwood/stump slice clocks made in shop class require more effort as you're cleaning, sanding, and sealing the wood.
Now if there was something creative with numbers and indicators or a housing for the clock, maybe that would be a bit more exciting. I just see these as a $2 mechanism, 10 minutes, and a wasted cart.
