No, because black has 13...Qc3+ :)
Is my move worthy of an !

! and !! ratings are rather subjective, as are !? ratings. A computer simply judges positions based on point values, and after computing many, many possible move combinations and judging many positions, it comes up with a point value for the current position and the best move. It then looks at your move and does the same process and sees the change in points. If there is little or no change, you made a good move, and the computer will not annotate your move. If you made a move that slightly weakened your score on the computer, it will throw back a ?!, or worse, a ? or ??.
We humans give ! marks to moves that we find to be astonishingly deep, surprising, or hard to find. These adjectives mean nothing to computers. That's why the chess.com computer wont ever give you a ! or !! (or a !?).

Thanks for all the replies. I seem to get plently !? though.
On chess.com analysis? Are you sure.
I think it awards ?! but not !?

I forgot what ?! meant. Dubious?
Probably bad, but the annotator is too lazy to evaluate it properly.

I forgot what ?! meant. Dubious?
Probably bad, but the annotator is too lazy to evaluate it properly.
We've got a winner!
Actually, I think the chess.com uses ?! to say, "Well, it wasn't SO bad, but your position went from roughly even to -/=" an innacuracy.
In think ?! is generally considered dubious -- objectively bad, but difficult to refute. !? is an interesting move that is difficult to evaluate. I think it's even lazier than ?!

From wikipedia:
?! (dubious move):
"...usually indicates that the annotator believes the move to be objectively bad, albeit hard to refute. The "?!" is also often used instead of a "?" to indicate that the move is not all bad. A sacrifice leading to a dangerous attack which the opponent should be able to defend against if he plays well may receive a "?!". Alternatively, this may denote a move that is truly bad, but sets up an attractive trap."
!? (interesting move):
"Different books have slightly varying definitions. Among the definitions are "interesting, but perhaps not the best move", "move deserving attention", "enterprising move" and "risky move". Usually it indicates that the move leads to exciting or wild play and that the move is probably good. It is also often used when a player sets a cunning trap in a lost position. Typical moves receiving a "!?" are those involving speculative sacrifices or dangerous attacks which might turn out to be strategically deficient."
http://en.wikipedia.org/wiki/Chess_annotation_symbols

The differences can be subtle. The ?! and especially the !? vary considerably by definition of the annotator.

!? Probably good, but annotator is too lazy to evaluate properly.
?! Probably bad, but annotator is too lazy to evaluate properly.
Hi I'm a rookie at chess. I've been playing for 2 months and am a fairly stable 850. I've submitted a lot of my games for analysis and most of my moves get a ? a ?? or nothing. Never gotten an exclamation point. But would my move 13 worthy of an exclamation or not? http://www.chess.com/livechess/game?id=584918720