Blackmar Diemer - interesting end game

i often play blackmar once in a while people respond different on the opening, that is they dont take the traps that this opening offers. Resulting in refreshing games, and new options to investigate. Here it resulted in a fast checkmate game.
what i like about it is how the last moves developed
i never had it like this before, so it suprised me that
this could be part of this opening a different game type