How is it possible not to fall instantly in love with this fabulous opening?
Englund Gambit

Fortunately, I follow Fischer advice and never play 1d4
The thread is about what black has to do when confronted to 1.d4. If you've played chess for more than one day, I'm sure you've already met this situation.
Plus there is a life outside queen gambit. London system, Trompowsky, Colle, Blackmar Diemer gambit etc.

it is a trap

I play that sometimes with black. About half of those I play fall for the trap. 2 d5 for white makes a bad time for me.

I play that sometimes with black. About half of those I play fall for the trap. 2 d5 for white makes a bad time for me.
Hardly a trap, just develop your pieces and play normally...

First of all it's a trap for unaware white premovers, e.g. 1. d4 e5 2. Bf4?? exf4
Then it's a tactical trap (especially the Qb4+ line). Working well against unaware opponents, even in games with longer time controls. But everyone who plays 1. d4 in online blitz or bullet, will fastly get good positions after 10 minutes analysis.
2...e5 is the only reliable way to avoid tons of rote memorized lines of queen gambit where black accomplishes his moral duty by allowing white to control all the center, hiding his king on g8 and not moving a single piece until he dies.
You have to know that Englund's main line is refuted but you aren't forced to go here.