Games can be won easily if all powers are out right? This opening frees the bishops, the queen and the rooks. Horses can jump over.
Is my opening any good?

If black decides to play 2... d5, what will your response be?
sacrifice...d5...so queen wont be in danger..right?

This opening is not good for white for a few reasons.
1. One of the goals in the opening is to control squares in the centre of the board so that your pieces have a greater range of movement and can reach their full potential. Moves like a4 do not attend to this battle area.
2. Another move, Bb5 is seen in other openings, such as the Ruy Lopez, but in this set-up, there is no call for it. Again it goes back to the fight for centre square control and room for you pieces. The Bb5 in the Ruy Lopez challenges a Knight and limits its effectiveness. In this position however, it is threatening nothing and will lose tempo when black plays c6.. then d5 (you will be spending you moves retreating pieces rather than bringing more pieces to bear on the position).
3. The early queen manuevre has similar problems as the bishop. In this case, the damage is more sevear. The queen is a valuable piece, so when she is developed, it needs to be with the intent of building an attack, or supporting key squares. A queen on f3 doesn't really build up the position, but instead robs another white piece, the knight, of an ideal square to bring out its potential. (it will control more critical centre squares on f3 than on e2, and definitly more than on h3). So this move really hinders your own piece development but does not cause any problems for you opponent.
Let's take a look at how Black should proceed development:
Also, queen is backed-up by knight.
I think it goes like this (my first time using chess notations)
1. e4 e6
2. a4 Nf6
3. Bb5 g6
4. Qf3 .....