Чит на бесконечную пальбу
:
var c = document.getElementById('canvas');
setInterval(function(){
var event = document.createEvent('MouseEvents');
event.initMouseEvent('click', true, true, window, 1, 10, 10, 10, 10, 0, 0, 0, 0, 0, null);
c.dispatchEvent(event);
}, 10);