Why did white resign in this pisiton?

1
e4
e6
2
Nf3
d5
3
e5
c5
4
Bb5+
Bd7
5
Bd3
Ne7
6
O-O
Nec6
7
c4
Nb4
8
Be2
d4
9
d3
Qc7
10
Nh4
Be7
11
Bh5
Qxe5
12
Qf3
O-O
13
Bf4
Qf6
14
Qxb7
Qxh4
15
Bxb8
Bc6
16
Qc7
Raxb8
17
Qxa7
Rb7
18
Qa5
Qxh5
19
a3
Bd6
20
f4
Nc2
21
Ra2
Ne3
22
Re1
Bxf4
23
g3
Bxg3
24
hxg3
Qh1+
25
Kf2
Qg2#

As the last move, Qg2#, is a checkmate, white didn't resign but got mated.

@jonesmh thank you, I see now!

lol there is even the checkmate symbol how can you miss it?

@domatas what is checkmate symbol?

not sure wether this is a serious thread...
# is the symbol for mate

@fredthecrusher thnk you I don't know the notation I Just copy pasted