I am having difficulty getting past 16%, I can't get three opportunities to turn lights on one bar fast enough to be able to switch and get three more lit before one bar over fills. As a result I get too few coins to be able to afford upgrades in a reasonable amount of time. I'm not sure if the best option is to slow the juice bar growth, reduce the amount of lights, speed up the slider, or reduce the price of upgrades by making them smaller incremental upgrades with more levels