"Ah, one other thing. Moonsparkles. Here, I'll show you."
MoonSparkles are bits of moon energy that helps Kutaro stay alive, in the event that he loses all three of his heads. Each time he collects one hundred of them, Kutaro gains an extra life, quite useful considering the overwhelming odds he must face in order to find his way back to his home and nice warm bed. They can be found anywhere from along the way or even through investigating his surroundings.
There are also Hundred sparkles which are equivalent to one hundred MoonSparkles, They appear as bigger versions of MoonSparkles and are rarer to find and harder to get. There's about two to four in every level. There's also a trophy for collecting them all.