Analyze this game

I am very new so I apologize if I make alot of these threads. Here is another recent game I won with a cool checkmate in my opinion. I think my board control in this game was very strong throughout but I know I have alot of flaws since I am still new. One other thing I noticed in this game was that I controlled the tempo quite well, atleast in my opinion. Some input and analysis would be greatly appreciated. Thanks alot! 

hang my pieces?

Yes.  He means don't leave your pieces unprotected.  You dropped some pieces (as in, lost some for nothing in return).  Practice, practice, practice!

'Hang a piece' means the same thing as 'drop a piece' -- in ther words, you let your opponent take your piece for free. 

Examples: On move 21, you hang your bishop on a3. On the other side, on move 20, you neglected to take white's hanging knight on a2.

For example, on move 13, you played Nc5.  The c5 square was covered by two enemy pawns.  Your opponent took your knight with one of his pawns.  You got nothing in return, or, in other words, dropped a piece.  I advise you to be on the lookout for loose pieces as you play.  It takes practice (I was once pretty bad at that).

uracowman, your move 15. b5?? is a blunder, as he can play cxb6, taking the pawn en passant AND trapping your dark bishop.

Instead of 18. Qa1, I think you should have played Bxa3.  At best, he drops the rook.  At worst, he drops the rook AND the knight on a2.

Oh yeah, and just so you know some of the chess terminology, here:

"hang a piece", "drop a piece": leave a piece to be taken for free and get nothing in return

"zugzwang": forcing your opponent to make a bad move

"en prise": leaving a piece somewhere that he can be taken for free

"isolated pawn": a pawn that cannot be supported by fellow pawns

"passed pawn": a pawn that cannot be blocked by friendly or enemy pawns