Interesting idea, but try to clean up the selection of the spider. There are a lot of jagged edges. Sometimes it's better to use the pen tool or lasso tool than the magic wand tool.

Author, when resizing your spider make sure to hold down the shift key to prevent distortion (in photoshop). I like your reflection fade and if you take care to refine the debris (HI RES exposes this) with a simple small erase brush will bring the chop UP quite well. The ghosting effect along the edges of the legs can be remedied with a soft BURN/HIGHLIGHT brush.
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Wonderful work and welcome to PXLeyes.