Game Analysis?

I entered this into Game Viewer from a yahoo chess game, so please excuse/point out some mistakes. It isn't the full game because I soon resigned (move 54 I think- mostly pawn stuff).
The only major flaw I found while playing was move 24 ...Qc6-f6 instead of going to h6 for hopefully a better endgame.
Please analyze!!!
Thank you.
[Event "Edited game"]
[Site "PENSIVE"]
[Date "2008.06.16"]
[Round "-"]
[White "-"]
[Black "-"]
[Result "*"]

1. e4 c5 2. Bc4 Nc6 3. d3 e6 4. Nc3 Ne5 5. Bb3 Nf6 6. Nf3 Bd6 7. Nxe5 Bxe5
8. Bd2 O-O 9. O-O d5 10. exd5 Nxd5 11. Nxd5 exd5 12. c3 b6 13. Qf3 Bb7 14.
Qf5 Qc7 15. g3 d4 16. f3 Qc6 17. Rfe1 Bf6 18. cxd4 Bxd4+ 19. Kg2 Rae8 20.
Rxe8 Qxe8 21. Re1 Qc6 22. Bc3 Bxc3 23. bxc3 Bc8 24. Qd5 Qf6
*