This is a classical boxing game where you get to choose your opponents and fight them in the ring. Many other boxing arcade games are too easy to win, but the speed knockout boxing game is quite different.
Only attacking will not get you far. You are boxing against professionals from all over the world and frequent attack without defense will expose you and you will get hit in the head. Right from the level 1 there are some serious gaming skills required if you want to get out of that boxing ring alive and with your hands up!