[2020] Wave Defense Win Condition?

Hey guys,

My friends and I beat wave defense for the first time, but it came abruptly and without warning. We had two people building up the factory for late game waves, while two others were clearing out a good chunk of nests outside each day. We got a simple notification that we won on Day 17, even though there were TONS more nests to clear and we certainly didn't have the rocket constructed. To be honest it was kind of a let down since it had been pretty easy and we assumed that we'd be put to the test in the coming nights.

If you guys could shed light on how you actually win wave defense that would be awesome as we simply thought you had to build the rocket or defeat all enemies (we were playing on normal difficulty if that makes any difference).

Thanks in advance!