I don't like the lighting it bothers me
Some nice adjustment layers could fix that and bring out some other tones and tone things up a bit.
The C4D that is behind the white thing in the center doesn't fit well w/ the other c4d's you used and it bothers me.
Otherwise use some adjustment layers and fix your contrast and saturation.
Also what's the yellow thing on the far left??
Looks a mistake somewhere made in the process with a layer mode perhaps.
But does not fit the rest of the tag imo.
Good job tho