Game is having issues loading on the main "play" page. Loads Unity pretty slow (whatever), but then HUUUUGE gap between that and the following load screen (meaning I sat there for almost a minute and a half). The "web player version" loads more quickly, but empty servers.... not inspiring confidence to continue playing.
That's a limitation of WebGL - a new technology that have replaced Unity Web Player. But since it's still a new and evolving technology it have some limitation, slow loading being one of them.
Also different browsers will have a different performance, I recommend using Chrome or Firefox Quantum and make sure to enable auto updates so you receive the latest optimizations and improvements