The Linux version works now :)
This is a fun little game! I do have a few comments and bits of constructive critisism though.
* The big red bars at the top and bottom are kinda distracting and take up a pretty big portion of the screen.
* You could have put the controls in that opening text. Saying "click to move" actually takes up less space than "controls in description" :P
* The pixel art looked really nice! Making the people who haven't joined you a little dimmer felt like just the right amount of differentiation.
* No sounds makes me do a sad :'(