Nice. Love the background, but there's something about it reminding me... oil painting that I dont really like. And I believe the Osiris should be set in a different point of view, a more agressive stance - this one shows up his flank as if invinting you to bomb it.
On the font, I'd suggest some special effect to fade it a bit in the signature.
err that'd be about it for my load of critism...
I really should restart doing these projects someday ><