How to do the clicker fast: put your left hand on the keyboard with your pinky finger on space and pointer finger or thumb (whatever is more comfortable) on enter and spam both space and enter simultaneously, use you right hand to butterfly click or jitter click the mouse. Buy the first rebirth without any upgrade, but the 1st and 2nd duck then rebirth, save up for 260 and then buy both first ducks at once, now buy every other duck straight away apart the last duck which costs 15,000 then do your final rebirth and continue with the run.