This is one of those games that just flowed right through to the end. I must admit, though, that the opponent didn't play aggressively enough..

I made a mistake. I was playing, white, not black.

A nice finale--but that was definitely a case of Black castling into it!  In addition to your continuation, you could've also won with 18 Nxa7 (18... Kxa7 19 Qa5+ Kb8 20 Nc6+ bc 21 dc)--or 18 Qa5 (18... a6 19 Nc6+ bc 20 dc).

nice game, you showed good understanding of the position after move 15.

This opponent must have resigned because he could have gone to h2. But then, your queen would go to g1 and the end

Sorry, i meant b8 and a7