Double Dragon 1 for Genesis has nice vibrant and colorful shaded graphics, the kind that Genesis games don't get enough credit for.
Black Tiger, you're spoiling me with all this Double Dragon goodness!!
There were a couple details that I really hated about the Genesis Double Dragon I. I just played through it real quick on an emulator. First, the stage 2 boss character has the same head as Billy and Jimmy Lee. In the arcade, whenever that enemy showed up he had his own head, which was always the same but was different from the Lee brothers. In stage 3, during the invasion of the enemy base, these enemies were black in the arcade, with colorful hair, while in the Genesis they are white and they look like the Lee brothers. The color of the Abobos is not always right in the Genesis version, In the arcade some were black and some were white, and the ones that were stage bosses of 1 and 3 had a different head than the others.
Also, the Ropers in the arcade were various colors, but they were always black in the Genesis version. The enemies of the last stage in the arcade wore blue and gold, but they wore standard colors in the Genesis version.
Perhaps the biggest disappointment though was that the green Abobo, the evil green chef, didn't have his trademark white pants in the Genesis version, and his head looked like all the other Abobos. I bought this game when I had a Genesis and i was really disappointed. It seemed like they really cheaped out to me.