JQuery click event works only once

I would use the delegate function, (just in case you ever choose to update to a newer version of jquery),

$(document).delegate('.option', 'click', function(){
    //etc
});

2017 Edit: The delegate function has been deprecated, the correct usage would now be

$(document).on('click', '.option', function(){
    //etc
});

You need to change this line:

$('.option').click(function() {  //etc

to

$('.option').live('click', function(){  //etc

This will ensure that all 'option' boxes will get the onclick event. Note that the live method has been replaced in later versions of jQuery with 'on'. See http://api.jquery.com/on/

EDIT: to use with 'on' use delegated events - something like this:

$('#canvas').on('click', '.option', function() { 
    //event handler...
}