Win against a computer

This is the PGN from a game I won on ICC against a computer. I do not think I played particularly well, I think the computer made more than its share of blunders (7...Ra7 stands out), but I was hoping someone could take a look at it and tell me what I could have done better, where my flaws are. Thanks

[Event "ICC"]
[Site "Internet Chess Club"]
[Date "2007.04.09"]
[White "ME"]
[Black "SlowFlo"]
[Result "1-0"]
[WhiteElo "1011"]
[BlackElo "1107"]
[TimeControl "1800+30"]

1. e4 c5 2. Nf3 d6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Nf6
6. Nd5 Nxe4 7. c3 Ra7 8. Bd3 Nc5 9. Bf5 e6 10. Qe2 h6
11. b4 g6 12. Bxg6 fxg6 13. bxc5 dxc5 14. Qe5 cxd4 15. Nf6+ Kf7
16. Ng4 Bd6 17. Qxd4 b6 18. Nxh6+ Ke7 19. Bg5+ Kd7 20. Bxd8 Rxd8
21. Nf7 e5 22. Qxd6+ Ke8 23. Nxd8 Nd7 24. Nc6 Ra8 25. Qe7#
1-0

That must be someone writing a program and testing it on humans. If you want a "decent" game play against GNUChess with an opening book. You will learn some openings and it is better than that weakling of a computer.