Can anyone analyse my game?

Yeah. I do want to get better but I am not serious.

I need a little more time to get serious.

Gotcha...I went through that phase of my improvement.  Good luck to you!  I would post a loss though.  

After the moves, 1. d4 1... d5 2. c4 2... dxc4 3. Nc3, if I'm black, I rather like the idea of 3. a6 here, trying to keep the pawn temporarily. This can give black interesting counter-play based on Bf5 etc, because the Nc3 is a target for b7-b5-b4 and black can get an aggressive game.

That's a good comment. You could put it a diagram though...

You have to be able to visualize the position.  That is essential to improvement.  

Oh. right. I forgot about that. Thanks, @IMBacon.

It was a good game by you, considering your rating. You played the opening following the basic principles, took the free piece and then won easily, which doesn't mean you didn't make mistakes.

Every game in history has mistakes. The important thing is that you find them after the game has ended, through analysis. This way you won't repeat them in the future.

You don't make mistakes in the Fool's Mate.

You don't. There's no point in analyzing a game that lasted 2 moves.