Hmm.
I really like the gameplay and choice of music, but the graphics do not blend together. The animation... it's decent. On regular enemies, you can turn to the back and on groups of two or more, you'll get hit approximately one time in two ninjas, but the boss ninja seems to know your attacks, even if you go behind them. You should include new combos and specials, including different specials. You should make Rin's katana (or was it meant to be a blade/sword from the start?) match with the character's, otherwise, great and oddly addicting.