Bonus Round is an aptly named title since this game is *just* the Street Fighter / Final Fight car smashing bonus game. The A button is for kicks and the B button makes the combination of Ryu and Ken punch. Players gain points by breaking cars which can use to purchase new combos.
Bonus Round is a free download and if you like it you can buy extra cars to smash with real world money.
You can download Bonus Round here.