add the ability for left click to be used instead of space bar

[amhooman]

I am trying to make this work on the wii u browser. It works there, but I cant start the game, as the wii u doesn't have a space bar

[Jcw87]

Duplicate of #143 You already made an issue for this, and I already explained why it isn't worth trying to make this work in the Wii U browser.