Hmmm... Not too sure about the sound effects. Some of them work really well, others not so much. If you like I can go on with you and help you weed out sounds that don't work.
Also, it's worth reporting there are loads of spam accounts. I've been trying to get a legitimate opponent for a while now but I always get an afk player whose name consists of random numbers and letters. Perhaps add email confirmation as a requirement when registering so as to combat this?
Those aren't spam accounts, those are quickplayers. (People that hit quickplay before making an account/signing in)
They are people with no account, so they are generated a random name.