Good job on the face, shoulders are too narrow.

Source 3 is a wallpaper.
Wallpapers are not useable sources. They are mostly copyrighted images, and not offered under Creative Commons licensing.
Please read http://www.pxleyes.com/guidelines/photoshop/
http://www.pxleyes.com/blog/2009/06/how-and-where-to-find-legal-source-images/

Source 2 is a premanipulated image.

Personally I like the dark street better, but you did a good job removing the people.

Good work on the figure, but the moon in front of the trees is not believable. You might have chosen a background with open sky.

Nicely done.

In this case I think cute works better; we've seen a million ferocious dragons. BTW, good work!

Deleting & resubmitting is what I've always done.

An admirable effort that would be improved by use of the perspective tool, and choosing a light source so as to properly shade the planes on the crates. The boards should be given thickness.

Good one.

Good idea.

Please fix your links. You probably put them in the text boxes.

With that strong light source in the background the the edges of the walls nearest us would be in shadow, and there would be a corresponding shadow of the little monk, again on the side nearest us. Always consider light and shadow when making a composite image with a strong light source.

Add skin tone to the face of the knight on the horse and you'll have a more convincing image.

Spider-man source is an up shot, the scene is a down shot, creating a perspective conflict.

Your new title is fine.

Please post your source links for the individual images. See http://www.pxleyes.com/courses/guide/guide.pdf and http://www.pxleyes.com/blog/2009/06/how-and-where-to-find-legal-source-images/

Also, Valhalla is from Norse mythology and has nothing to do with Buddhism.

Please spell Buddhism correctly on the book. I don't understand the juxtaposition of grayscale & color, but that's your decision.

I pay attention to light sources. In a composite image, they should all match. And shadows should conform to light sources.

Please flip bishop for correct lighting & shade king according to light source as well.

Source for tires? Reflection of tires is at wrong angle.

Interesting, but pretty pixelated, considering the resolution of the source images.

Source for monster?

Pieces should be proportional to the board.

Nice DOF.

Author, entries are supposed to be anonymous. Please remove the signature.

Much better! Almost there...just make the back of her mask match the shadow on the neck.

Interesting idea but the light sources on the figures are opposite, and there's no corresponding light & shadow (Which could have been done with dodge & burn) on the female figure's gas mask, which isn't convincingly joined to her neck.

Rein beat me too it...good work!

I had no idea Tin Man was a giant. He looks so normal in the movie.

Good mood & lighting!

Great scene & mood!

Good layout, but very pixelated.

Author, the background image is premade, and not useable. The DA author clearly states it's premade in his description. Be careful when choosing DA images. (Also, the cloning of the sky is painfully obvious).

Good idea but pixelated.

Ummm...OK...

With nobody attached to them?

Nice. If you make a dog, you can call it Pup Art!

Very nice. SBS would be nicer yet. PS: Putting chrome trim around the window would be extra cool.

Some edges could use attention, but it's definitely pop art!

Try to give his feet a proper shadow. The shadow of the toilet & tub leg should be a clear indication.

Might have been good without the trombone thing.

Try to fix the distortion on the figure. Hold down the shift key when resizing to get a proportional image.

Nicely done.