Just glancing over it blitz-style, on move 21 you probably should have kicked the knight. Letting an opponent get advanced majority pawns in a blitz game, even one you're a piece up, is a sure way to create a headache for yourself.
The general rule of thumb - when you're up material exchange pieces not pawns is a good one especially in blitz, especially when you're trading pawns on the opposite side of the board giving your opponent annoying pawn pushing chances (which will at the very least gain him time, especially in a game with knights).
Not so sure about 24. Na5+ either. Probably better to move your knight towards the center avoiding pesky attacks from K & p's.
Looks like 29. b3 was your final mistake.
At least you didn't lose.
Nice opening attack though, stuff like that is the reason I don't play 1. ... e5 anymore.
I tried to challenge you BTW, but you signed off right as my game ended.