It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

As someone who uses an Arch-based distro I am very happy with Amarden's ./play.it package for Sid Meier's Alpha Centauri (plus Alien Crossfire) :) It works really well :)