Pretty cool,especially when you get the new sword and have blue hair.The bosses have a decent amount of difficulty so by far this is tied with Zombotron 1-2,and the last stand games.
When I got the katana I started singing DO YOU LIKE MY SWORD SWORD SWORD MY DIAMOND SWORD SWORD YOU COULD NOT AFFORD FORD FOR MY DIAMOND SWORD SWORD(song-I can swing my sword)