EDIT:Second run through took about 2 hours, skipped the story as much as I could as it's nothing amazing. The gameplay is where the game really shines. It's definitely a game to be played with KB&M. I just got good and only really struggled with the final battle due to overwhelming number of opponents. Katana only mode looks fun and frustrating. Will have to go back and play the other game modes unlocked once beating the game. Delays between death and restarting the level is still annoying.
ORIGINAL: Playing with KBM or controller are both terrible. At higher levels, the enemies begin to move faster and have better weapons. You will die but most deaths are not due to me being reckless but because I haven't figured out the spawn points of enemies for that level. I am not a fan of being punished because I don't have the knowledge of weapon placement or enemies for a level, punishing recklessness I understand but this game doesn't do that. There is a 5 second delay between each death before restarting the level which is incredibly annoying, it should be instantaneous.