The VG Resource

I am almost certain that this page isn't going to tell me something I already know, but I recently discovered existence of screens of an unreleased PC Engine version of Cocoron, a game I was planning to unofficially sequelize. What I'm expecting is that "This game is unreleased, no known rom exists", but by the looks of it, they had some sort of halfway decent prototype. I even recognize several of the bosses, though the locations seem less imaginative.

Anyway, help a guy out? Is there anything interesting in here?

http://www.geocities.co.jp/HeartLand-Suz...nfs22.html

I will add that game to my "to find" list, but that's al what I can promise right now. Sorry.

I'm not getting my hopes up, so don't worry. It seems to be one of those incredibly rare unreleased games, the kind with only a handful of prototypes and no roms online.