Quoting Olli K
The overall look is good. Is it really minifig scale? If so, why not include a pic with a pilot fig next to it to show how tiny this rocket fighter was? I would change the rear section (build it closed - it looks like it will fall apart any moment), the wings might need some work to make them a bit more stable, and the colour scheme is odd. Those are minor changes, but it will make your Komet more accurate.
Thanks for the constructive criticism, it's always appreciated, and to answer some of your questions:
1) A minifig looks good besides this thing and the wings are to scale but I couldn't make them to be angled back. And I didn't have many minifigs in that time.
2)I closed that some time ago because, as you said, it fell in any moment.
3) The wings are pretty strong and don't break often.
4) I did it in that color scheme because:
a: I don't have that many gray, dark gray, bley or green or any of those colors.
b: My inspiration (and source of pics to build, because I prfer building in the 3D a videogame gives, rather than 2D computer pics) was a videogame called Secret Weapons Over Normandy, and the Komet was painted totally bright red (I think it was red only for test versions, here's a link:
http://aviationartstore.com/images/Me-163_Spate2.jpg , so I thought it'd look good.
Thanks for the useful review. I see you live in Germany, there must be some of these over there, in my country there isn't much to look at, only a P-51 from a rich guy. It's a great comment coming from a great builder like you.