Probably the most fun game I've played today. Its challenging, but the controls are intuitive and you can quickly become accustomed to them and do some pretty skillful stuff. I.E. switching quickly between attacks in order to make use of their cooldowns while dodging can make you feel like a god. The lack of any audio hurts it a bit, but its still a really solid game. An easy 4/5.
P.S. There's also an Easter egg hidden somewhere in the game. Just examine your surroundings carefully and you'll probably find it. Have fun!