Well, that sounds like it works. Gotta run in a minute, so I can't reenact it now. Let me give you my easier version:
10. G*4ii check
I then only have one legal move, as your Gold is protected by the Bishop:
...10. K-2i
11. T*3ii check
Again, I have only one legal move, and my Tokin is defended by the Gold:
...11. K-1ii
12. R*1iii, where it is defended by the Bishop and delivers checkmate. :)
Did you figure out how to get Micro Shogi going? You can go first.