Reminds me of Touhou. Like, if you describe this game like: "A priestess using amulets goes to exterminate the evil and save people, all alone, resolving the problem. It has 6 stages and an EX-stage, with bosses at the end of each." it'll sound pretty similar to what Touhou is all about. It even has a weird atmosphere of not explaining anything, just making you fight through, seeing some text in-between the stages. And i think you can even replay the stages after, in the recollection room?