Yep.

A move with some positive aspects including trying gain the initiative but again probably not best.

I would have gone to c2.

The purpose of this was to clear away the d3 pawn and land a knight on c4 hassling the Queen and maybe b2 but in retrospect I'm not convinced this so called threat means very much.

If Nd4 I think white is probably better. He continues with his policy of trying to force exchanges but now he is only a nominal pawn up and a rook still to develop.

Offering the exchange of an active white piece and bringing the knight back onside probably helps black more.

This looks horrible but if Nd4 then Ra5 wins the Queen.

After 14 cut and thrust moves material parity is restored.

Taking aim at a2 and an attack on the king.

This allows a mate by blocking a vital escape square. I dont know if he was nervous about b2 or wanted to come down the d file.