go to one of the links. Then, click the gear and select, 'download as .zip' Once you have opened up the folder you have downloaded, run the .html file. If it does not run, install the unity web player (http://unity3d.com/webplayer). The chrome version is a LOT more reliable. Ask me if you are not an admin and it won't run on your computer.
For chrome: https://www.dropbox.com/sh/ujm6mklwwwefwtv/K1C1z1zyb0 For other internet: https://www.dropbox.com/sh/p6fyvmplza8a851/2vKchM8m7O Note that this is an unstable beta and will not have the gun in the final version. Options also retain through quitting! Gameplay does not. :(