As the odd man out... I have a brain injury and peripheral neuropathy (fingers no feel so good) so the tiny speck for perfect is almost impossible to hit. Perhaps seeing as how I see someone asking for a higher move speed perhaps offer a difficulty of easy, medium and hard with easy being a slower moving potion bar, a larger central target and a slightly higher payout, medium being what is now in place and hard being very fast potion bar, smaller targets and maybe as a reward a larger reward (say 4 gold for a average potion and 8 for a perfect).