I'll admit I was only vaguely aware of the first game, despite it being something of a phenomenon. I'm looking forward to this one, though.
Looking forward to KSP2.
BTW, for those who have not seen it, here is the original fan-made video that this official teaser is based on and dedicated to:
Ah, so *that's* what that bit at the end of the official trailer is referring to! Thanks for the elucidation,
Staggerwing.