The bevel on the left of the "key handle" seems like it should also be added to the left of the "key stem" to me.
Or maybe a slightly more defined bevel on the other side of the handle to make it look like the key is laying straight down in front of you. I noticed in the XCF your shadow looked like the bevel was going from the right side so i was just wondering if you noticed that also?
Does look pretty realistic though.

Nice work.
Especially the tag very nice looking design.Looks very real.I like the way you added the part around the string hole.