This is really cool.  I've been watching it run on a couple of computers here.

I'm getting consistent results here, showing that the selfish mining strategy is a really good way to lose 20-30% of your mining revenue.  I'll note that this is roughly what I was expecting.  In every other context, the whole world considers it obvious that getting your blocks out as fast as possible is a good thing.  Still, science is the art of not fooling yourself, and getting the result you expect is not the same as showing that a model has skill.

As fun as this is, it needs to be much faster to be really useful.  We need hundreds or thousands of runs, covering hundreds or thousands of blocks.  We also need to verify that model parameters are realistic, and that the simulation isn't adding or causing un-real effects.  We should also invite the authors to verify that the attack behavior is implemented correctly.*

* To the limited extent possible.