Not bad but..
I like the graphics an the sounds are ok too. The game is enjoyable but the gameplay has some serious flaws. The worst is that there is no continue, when you die you'll have to start over! This is hard to forgive to any game.
My other problem is with the fighting system: you can't dodge! The enemies can attack you easyly while you chop them, the basic attack doesn't stun them or push them back to make them harder to hurt you. You can jump, but it does nothing, it wont help you hit the enemies more or harder nor dodgeing their attacks. The slash and the dash are useful but they drain your mana quickly and kill slowly, so they are better at reducing the number of enemies you are fighting at once and getting rid of the invisible ninjas. Teleporting is'nt useful either becouse you can slash or dash instead. I didn't find the way to become invisible. And while you can't dodge or parry, the enemies, especially the bosses can deflect your basic attacks, wich is not fair. It is suicide to go near the bosses and try to hit them, you won't manage to hit them, but they will hit you hard! I could only kill them in the cheap way, keeping my distance and slashing them continuosly. But that's pretty boring.