What you could do is remove the first two hit bars and only have three. The earliest one being a normal hit and probably easy to spam if someone just wants to quickly attack. The second one being a mana regen hit, and the very last bar close to the end being a crit hit. That way it makes it so folks who just want to quickly hit can just spam click and those who want to have higher rewards with risk need to wait till they can hit. You could also alter the size of the hit markers to give off an idea that smaller hit sections closer to the end of the bar are better compared to the big hit area at the beginning of the bar.
I don't really know how programing this works so take this as a pinch of salt. Do hope ya have fun with developing this and pace yourself. Don't wanna get burned out for doing to much at once.