Road to 1500 (Day 2, game 2)

game can be found here

1. According to the analyzer, I played a Giuoco Piano opening. I have no idea what that is.
3. I probably blundered here:

This is what happened next:

3. I continued on with a decent queen to b3 move, protecting the knight as well as reinforcing the bishop for an all-in gambit:

4. I think no matter what Black side does, they lose their queen.

5. The game ended in my opponent's resignation on:

6. Strangely, the engine states no one has an advantage yet.

7. I think I need someone who knows what they are doing to explain my own games to me :P