I don't know if I miss something here. Is there anything to do beside killing the three people and get a Game Over? If not, I can't really comment on this game because it hasn't much gameplay.

I was able to kill the brothers without swinging the sword, just running into them at the right angle. Interesting perspective shift, looks like a 2D game at first, but once you get movement it feels otherwise. Looks like a good start to a combat mechanism, if the red characters moved autonomously it would help.