This game needs a fast browser preferable on a machine with a good GPU. Use Chrome or Firefox.
I developed this game just for fun. Main problem is that the actual browsers are still not fast enough to handle a fast realtime multiplayer action game like this.
I made several benchmarks, performance tests and rewrote the entire game several times to make it faster.
If you have feedback: Plase send me a mail to firstname.lastname@example.org
If you like this game and want to support it's development, please donate.
Also, if I get enough donations, I will release the sourcecode on github.