There are other people who've played it. Noxid and Wild Desu come to mind...but yeah, I've played it. Really enjoyed it, too! ^.^
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Cave Story Tribute Site Forums
Polaris
SeasonsOfDestiny
Same here! I really like it when a game can creep me out in a non-cheap way (Zone 3, I'm looking at you so hard). I also loved the battle music (except during the later parts of Zone 3, but that doesn't count).