Maybe this is an example of what low expectations can do for a game that, in reality, isn't all that great. I expected very little from this fighter, as I'd always thought its characters seemed terribly generic. And the fact that I wasn't particularly thrilled with Fatal Fury 2 made me skeptical of the purported quality of its hailing-from-the-Neo Geo kin. Well, AoF's graphics aren't as impressive as FF2's, and its characters aren't as cool as Terry Bogard's crew, but I have a strong preference for its actual fisticuffs, and I get a kick out of its goofy plot. In fact, it plays well enough and has proven amusing enough to rank among my favorite fighters for the PCE.
...but they're rendered gigantic once they approach each other and the game "zooms in" on them. It's a gimmick, but a very cool one, and the Duo pulls it off pretty darn well.
The bonus rounds aren't very exciting. Hit the button at the right moment, or mash said button as rapidly as you can.