У вашего броузера проблема в совместимости с HTML5
this is a portal 2 playground me and 2 of my frineds did
hope you like it :)
INSTRUCTIONS:
copy the .bsp file to:
Portal2/portal2/maps
and when you and your friend in game type:
changelevel mp_coop_map1111
enjoy :)
UPDATE:
i updated the map
download:
http://www.mediafire.com/?eld2rwqa1ui5u3r
SP:
http://www.mediafire.com/?7ajbms6i2qd0kw9
in the map:
-new room
-the "stick" gel (its an unused gel so he does nothing)
-floors added to atlas and p body rooms
-cube droppers added
-laser added
-bridge added
-turret dropper added
Update 2:
-Added cores
-now you can open atlas and pbody room in single player
enjoy :)