I just picked up Double Dragon and this game has massive slowdowns. With three enemies on the screen everything slows down to like 10 fps or something. It's horrible and nearly unplayable. Once I managed to kill two of them the framerate increased considerably. I can't believe I wasted 7 bucks on this port. Did the other ACA releases so far have any similar issues?
For now I strongly advice against picking up Double Dragon, it's no fun like this. Hope they patch this mess. Nintendo doesn't offer refunds, do they?
/edit Apparently that's just the way it was on the arcade. Well I'll just say, take it into account before buying..
Yeah, it's EXACTLY how the arcade version ran, which is to be expected. The slowdown is a bit annoying but for me not unbearable as you said, and it is still a fun game overall.