It is possible that in seeking open lines for herself, Black compromises too much. Still, it's a line worth testing...

Whether or not the alternative 13...Bb4 is better, I would certainly have considered it (as I daresay Joanne did herself). After this capture, White completes his development with frightening rapidity.

This is remarkably speedy development by White! Black's pieces are all at home, awaiting deployment. It is likely that White has the better of it here. Black might have to look for an improvement somewhere in this sequence, but the only move to come to mind seems to be the counterintuitive 15...Qe7 with the idea 16.cxd3 Qb4+ 17...Qxb2 with an interesting, unclear game in prospect.

For instance: 17...Qg8? 18.Ne6+ Kd7 or ...Kc8 19.Nxg7+ wins a piece. But more interesing is 18...Kd6! 19.Nc4+ Ke7 (19...Kd5 20.Nc7#) 20.Bc5+ Ke8 (say - other moves don't seem to be any improvement) ) 21.Nd6+ Ke7 22.Nxg7 Nd7! (22...Qxg7 23.Nf5+) 23.Nf5+!? (23.Be6!?) ...Kf7 24.Nh6+ Kg7 25.Nxg8 Nxc5 26.0-0-0 Rhxg8 27.Rhe1 and White emerges with a marked edge (extra pawn and more active position).

At that, castling short might have been the better option. Black could play 18...Qd5 now, attacking at once a2, g2 ... and e5.

Understandably wanting to cut back White's resources... Black seems to be well in the game still.

I suspect that this might be the turning point. The move played seems too slow. Better was 19...Qd5, even though it contemplated giving up more material: 19...Qd5 20.Rhf1 Rxe5 21.Bf4 Kb6 22.Bxe5 Qxe5 23.Nxh7 Qxh2 24.Bh3 Nd7. Black would retain in this line a marginal material edge (Q for R plus   but otherwise it's anyone's game.

The losing mistake. Maybe Joanne had seen that 23.Ne6+ was obviously no good, and figured that 23.Nf7+ let the K out via the 2nd rank. But White's pieces are very active and mobile - far more than Black's.