Rocky's decision to push 5...e4 I think determined the whole strategic character of the game. I was reasonably familiar with the idea, having looked at it in other closed-type English positions, so it didn't bother me too much. Here I thought it was going a little too far out on a limb for Black, since the pawn would be difficult to support properly. That is in fact what occurred, as White in the early middlegame is able to pick up the pawn.
I was worried about some of Black's counterplay shortly afterward, for example if he had chosen to penetrate on the second rank with 19...Rc2. By the time he decides to try for counterplay a bit later on the kingside, however, I was able to calculate - after some initial trepidation - that it would come to nothing. Once Black's threat was dealt with, I was able to find active, attacking continuations that increased White's positional advantage and eventually led to a mate threat. This is in contrast to earlier in the game, where I passed up several interesting, aggressive continuations (8. g4!? and 19. e4 stand out) in order to put safety first.
Thanks again to Rocky for an interesting game and of course for his good work organizing the tournament. I plan on participating in the next one on FICS, the Double My Egg Nog tournament, which still has one space free for an interested player.