One of the better film licences.
The extra Mega Drive levels included action in the Batmobile and Batwing in which you would blast the Jokers clown cars off the streets of Gotham or destroy the balloons full of poison gas. The music was also much better. I mean it's been years since I played that game and I'm STILL whistling those brilliant tunes.
But there was just something about the C64 version that I preferred. I can't really put my finger on it. Of course, as all movie tie-in platformers were at the time, the levels are bizarrely designed with pits full of spikes and exploding walkways but the gameplay and atmosphere make up for that.