Hey Will!
Great question. I took 201 a few months ago, so I'd like to think it's still recent. Regardless, I'm still learning.
For me, a moment that really helped me "get" game was in the most recent Matt Besser Workshop.
At the time, the most difficult aspect of game for me was coming up with a good, clear idea for a second beat. Besser explained heightening as such:
"Heightening is not raising the stakes: the second beat isn't always better than the first. Heightening is more of "another good place to play the game." In essence it is another scenario with a potential for placing this 'comedy machine...'"
It was that last part that really resonated with me. I understood a lot of aspects of game (for the most part--I realize that I had only completed 201), but referring to game as a comedy machine: this entity that's sole purpose is to generate material organically based on something that you and your scene partner have landed on together, put it in a new and really interesting perspective. Heightening and thinking of second beat ideas in reference to game became a lot simpler once Matt Besser explained it like that.
On a side note, Besser also explained exploration as the fuel for the comedy machine...I would certainly never undervalue the exploration half of heightening and exploring
