hmm.... for some reason I still cannot left click to shoot anything.
Could you please bind the Shift key to also shoot the weapon? Might it be possible that the mouse clicking is being lost in the canvas layer in the window that opens?
The browser says the mouse control is part of the game, but it's still not working for clicking. Only for looking around.
Is it possible you've used specialized JavaScript only for one kind of browser? (I use Firefox)