The original OCS conversion is a great shame for Amiga. It was aiming for 1:1 pixels at the cost of everything else The result is Final Fight graphics (almost, since the colors ruin it a fair deal) on the Donkey Kong engine. Terrible game. No playability at all.
The graphics should have been scaled down in order to lighten the load (like Sega and Nintendo did) palettes fixed, and gameplay done a lot better.