With Katana

Fighting the katana is very simple, all you have to do is hit first when the enemy approaches. Be the first to hit him and give him an advantage. When you first hit him, click on the mouse at the same time and repeat it all the time. You will surely win.

Where is Katana ?: If you have just started the game, go to the shop and take the katana from there, tell someone, it will show you.