1. e4 c5 2. d4 cxd4 3. c3 Nf6
I personally don't like this move as it allows white to transpose into an Alapin. I'm convinced that the SM gambit leads to equality at best for white, but the same simply can't be said about the Alapin. However, this transposition does avoid a lot of nasty tactics and that seems like a reasonable approach.
4. e5 Nd5 5. Bc4
I guess Lenderman plays this, but it just looks considerably less awesome than 5. Nf3 6. Bc4 imo.
Qc7 6. Qe2 Nb6 7. Bb3 d3
This was a very accurate move order by black. Qc7 looks quite good, forcing Qe2. Then Nb6 nudges the bishop to a worse square before d3. If black plays 6 ... d3 7. Qe4 Nb6 8. Bxd3 is much more comfortable for white.
8. Qxd3?
This is probably just a mistake. I don't see how giving up the e pawn can be okay for white. Again, Qe4 is probably best. d2 is well guarded so the pawn isn't going anywhere.
Qxe5+ 9. Ne2?!
9. Be3 followed by Nf3 and Nd2-e4 or something like that looks like it gives white much better chances to gain counterplay.
Nc6 10. Bf4 Qf6
Okay, so here's a good spot to take stock of the opening so far. White is down a pawn, but what's much worse is that his pieces aren't well placed or coordinated. Ne2 would probably much rather be on f3. Bb3 is actually well placed, Bf4 is just sort of hanging out, eyeing black's queenside. Nb1 would like to go to c3, but can't. Black's position is solid. Nothing spectacular, but no real weaknesses to speak of. Only problem might be the Queen on f6, but it's hard to see exactly how white takes advantage of that.
11. a4
Maybe I just don't understand this move. If I'm white, I would try to develop as fast as possible and this move doesn't seem to help. It does threaten a5, undermining the knight, but is that really a problem? Plus the white queenside now has some pretty weak light squares. Not an immediate problem, but kind of a weird weakness to inflict on yourself with no/little comp.
d6 12. Nd2 Bf5 13. Qe3 e5 14. a5 Nd7 15. Bg5 Qg6 16. h4 h6 17. Nf4 Qh7 18. Nd5 Rc8 19. a6 b6 20. Bf4 Nc5
White's trying to drum up an attack. I just think he was completely hampered by his first 10 or 11 moves. With a little accurate-looking defense by black, white's lead in development is absorbed and I think the game is probably already over.
21. Bc4 Nd3+ 22. Ke2 Nxf4+ 23. Nxf4 Be7
Oops, black has the 2 bishops and prevented white from castling. Not to mention that any cramp black felt is now gone and by reducing the size of white's army, black has seriously hurts white's chances to drum up an attack.
24. Nd5 O-O 25. f3 Be6 26. g4 Bd8 27. g5 Ne7 28. Nxe7+ Bxe7 29. Bd3 Bf5 30. Bb5 Rc5 31. Ba4 h5 32. Rhg1 Qg6 33. Ne4 Rc4 34. Nf6+ Bxf6 35. gxf6 Qxf6 36. Bb3 Rxh4 37. Rg2 e4 38. f4 Bg4+ 39. Kd2 Bf3 40. Rg3 Rh2+
And black does a nice job of finishing off the game.