Gate count is interesting from a "how much would this const to make" perspective, but I think minimum clock cycle time is a more interesting metric, as that will show how fast you can run the thing. Maybe a two dimensional plot? It would be very interesting to have a worldwide "leaderboards" section with a dot on the plot for every entry, and a link to see how they did it.
Interesting idea, but how should this be determined? Would it be a "cost" per transistor and wirelength, and then the minimum clock cycle time would be the "worst case" path through the circuit?
Thanks, it is a very cool idea. I wanted to make the game really simple and accessible, but there seem to be interest in optimization challenges like finding the smallest/cheapest/fastest possible solution.