Queen is powerful!!!
No no, djls, after
1. Ke4, then
1...Qd3#.
Lordchaos is right.
And that is an enormous problem in a puzzle.
Oops! That's cool though, making puzzles is freakin tough, because missing things is easy.
So, what exactly that random sequence of moves in the OP is supposed to prove?
He had an idea; wanted to make a cool puzzle for the community that contained the element of black having a few queens and still a mate getting pulled off - tried some things out, found something and missed something critical, doesn't deserve to be pounced on for trying, will be better at making future puzzles for the experience.