very cool
im giving tens because of the microphone idea. but 2 things- make microphone a mode of it, make a regular one too, clicking or somethin. and make it more sensitive, i have to coast most of the way, i get either 0 or 100 on the power, and those make it move a little. actually 3 things- make more stuff on it. other than that, good idea
p.s. one more thing, plz dont make the red potions be picked up by the growth caused by green, theres no way to avoid red that way, so it shouldnt take effect