Lol! I piano no0b !

i think the hands to need a shadow.. they look a bit floaty.. good luck.. nice flash back

Piano white keys are shorter.

same hand flipped, do some light & shade work(right hand shadow and light direction is not matching)

gl

if this texture under the hand is the ground then you have you darken it, if its a table or something holds the hand then you need to drop some shadow from the hand, good idea, good luck

nice chopping....but there's a lighting problem....acc. to shades on both hands it seems tat light comming from top left and right corner towards the bottom center....where shadows of hands on bench ground indicates tat light comes frm left......I think shadows should be inwards to center bottom.....GL