Hello,

Here's a little help for the controls :

 WASD or Arrow keys                      :  Move
 Mouse or Joystick                             :  Look around
 Space bar or Joystick button 3  :  Jump
 Enter                                                         :  Open and Close Dialog box                                                 Ctrl or Cmd                                           :  Run

I also did not test and couldn't test the Mac OS X and Linux versions of the game. If they don't work, please tell me i'll try to fix it ASAP

You can play in the browser, though I would Not recommend it : the shaders don't load properly, and it is laggier.

Enjoy !

Also, for the people who like the music : It's made by Adrian von Ziegler, here is the link