At first glance ...
The SEGA logo's white outline should be changed to be like
this oneNote the pointed corners.
There is also a small gap between the GENESIS text and drop shadow.
Also there is a small bit of dirt around the horses foot overlapping the SKU. The text is a little pixelated on it as well. The type face is wrong on it as well.
I'll post a good way to touch up SKUs in a second.
You may want to retype the smaller text under the 1 Player box, its a bit pixelated.
The image could probably use a bit saturation/ contrast raise, but is clean.
Lookin good overall though.