The pre-existing four button layout is still an option, but a new six button sprawl provides an alternative control scheme. The game's listing mentions an "SP button," meant to make pulling off special moves a bit more feasible without the tactile feedback a real fight stick would provide. The port also unlocks characters from the get-go that were originally hidden away in the Neo Geo version.
Considering its 35-character roster and support for Bluetooth multiplayer, $3.99 isn't a bad asking price. Much more affordable than other recent options for replaying Neo Geo classics have been, at least.
Update: Included mention of King of Fighters '97 coming to Android as well.