Bullfight takes place in an overhead perspective where you, as the matador, must defeat the bull by lodging your sword into the weak spot just beneath the top of his neck. You have a fair deal of space to move in the arena, where you leave your capote perpetually outstretched. The bull often charges forth when you're close enough and sometimes aims for the capote, though you'll have to watch out for how close his head comes to the matador's body. As the bull runs by, you'll have to position yourself a fair distance so you don't get hit but close enough so your sword can reach the bull. One button attacks while the other redirects the capote to better face the bull, and as it gets close, your sword will automatically aim for the bull's small yellow weakpoint. If you graze the spot, you get some points and the circle enlarges into a green hole for a few seconds, and if you're able to strike the bullseye (pun semi-intended), the bull falls down as the sword is lodged into his backside.
Killing even the first bull is not easy, and bulls may sometimes get up and shrug off your sword, forcing you to retrieve it and stab it again to end it for good. If the bull hits you with its horns, that's the end of your current matador. Being grazed by any other part of its body only knocks you down, but getting hit head-on flings you out of the arena. An interesting touch is how your lives are represented by three different bullfighters, with your first guy wearing green, the second yellow, and the third dark blue.