Chess: Fragments from a game

So I had black in this game, I will only show the ending.
The first position is a bit of an introduction, try to figure out what white threathens.


























































My opponent found the most obvious threath, but missed a secondary one
(Fyi the obvious threath was Nf5 moves away and Nxh3 with what seems like a winning attack).
he played 1.h4
To which I had another plan in mind 1. - Nf3

After this the game concluded
2.gxf3 Qxf5 and white resigned.