Not to be overly critical, but I'd say white opens rather ineffectively. White should have taken the free pawn. Instead, white opens his rook up for potential attack.
Had black moved his bishop to g7, then white would be on the defence. White would have to block with either his knight or his pawn...allowing black to push his pawn forward, placing the knight at risk. At which point white loses any immediate advantage he could have had.
1.Nf3 is a good move.
1...g5?! hangs a pawn. 2.Nxg5 and White has an advantage. Granted, Black gets some initiative for the pawn but not nearly enough.
2.b4? allows 2...Bg7 and 3...g4 when Black has a slight advantage.
3.Bb2 is a good move, but it doesn't win a rook as you claim, due to 3...Nf6.
Here's the game Matthiassmall mentioned:
opening move are importtant in a good game any body have any like this?