While still obviously a work in progress, this game suffices as a demonstration of how to apply digital logic principles with mesecons and a demonstration of several digistuff components. It does not introduce digital logic principles to someone without that background, but is good as a kind of recipe book for people with some experience already. Perhaps in future it can also introduce the basics.
The text is sparse, or sometimes missing, and you will only get out as much as you put into interacting with each exhibit. I was able to understand the interface to some of the latches, for example, without understanding their internals, but further study and interaction would lead to a better understanding.
Better care should be taken to guide the flow and mark prerequisites in some places. I did not understand the I/O expander when I visited the magnetic swipe card exhibit, so marking a prerequisite of I/O expanders for the swipe card, or removing the use of I/O expanders from the swipe card exhibit would be more helpful.
In terms of performance, the exhibits are mostly tolerant to quick switch flipping and the use of clocks that are off by default helps performance too. I was able to get the I/O expander direct connect exhibit stuck with one pin on though.
I was a bit confused to see the use of 1's complement representation in the display decoders. Perhaps it is easier to build than 2's complement for a display decoder, but 2's complement is vastly superior for arithmetic. Also the sign bit would usually go on the left of all the place value bits in my mind.
The exercises are still also definitely a work in progress, with the second one having several 'wrong' ways to solve it. A good series of exercises can be hard to put together but a well-put-together one would certainly add a lot of value.