You have nice action game here with some nice polish. I enjoyed playing it!
The sword swipes are looking great! And counter-attacks sound nice!
As feedback, maybe it's an idea to instead of using the ninja portraits to show what the enemies are weak too - use a more readable explanation which is related to the game world.
Perhaps let the player know the weak type of the enemy by a colored aura around the enemy. (Example light blue vs purple shadow, which also the ninjas use)
I feel this gives more flavor to the game world and the player doesn't have to look purely at the icons.
Overal I am very impressed!
Well done on creating and finishing a game!