As someone who built the core of a Lancer implementation, including full initiative, action/reaction systems, and a substantial part of mech customization, I can see that this is well programmed.

My only complaint is that even at +2 difficulty, all the way up to LL12, it is pretty easy.  Yes, even 4 rounds without repairs.

But hey, well done.  I enjoyed writing the data structure for handling actions and reactions the most, and here it is for anyone to see:  gist.github.com/1132akr/51de44f4503d8d6a75bd82d502fddce0