Aaaaaargh! I need help! <blank spot!>

WARNING: I'm new to this...
Oh, and this was made in Paint.NET

I'm trying to make a sig, tribute to Daft Punk, because, quite obviously, they rock your socks off.

So I make this sig, it takes me, what, an hour? But I really like the outcome, until, *GASP*



Can you find the problem? Yes, that big blank space there! I was thinking about inserting my favorite songs by them there, but I decided to ask for your help.

And would you mind a bit of CnC giving? Rating?
(Regardless of the void in the middle)
Yah, this is incomplete.

 

It looks like the top is cut off. Is it suppose to be like that? I think it would look better if you made it so it doesn't look cut off. You could, however, add a border to the sig as well it you don't want to fix the cut off. I would also make your sig a little bigger in size. At least the size of mines. Makes it a little more clearer and helps the person looking at it to see what you've actually done in the sig. As for the blank space, why not, move the render over to the left more so that the guy on the right isn't cut off. You could then make the "DAFT PUNK FOREVER" fit into that blank spot AND/OR move your user name from that bottom left corner into where that blank spot.