Indonesian traditional snack usually consist of : glutinous rice, coconut milk, shredded coconut, palm sugar, and... colored green (pandan leaves flavored). It is kind of typical snack around Malaysia, Thailand, and neighboring South East Asia.
Of course we have snack that has no characters above, but that still consider as traditional Indonesian, because it have been known in the archipelago for really long time. Usually those are snacks that we've adopt during colonial era, or even older than that! Sometimes that particular food stray so far away from the original food, but still hold the same name! Or visa versa!