Hey, so upon looking at the downloads on the site (I'm getting a PocketCHIP soon so I've been looking into the RasPi build of NXEngine) I noticed that under the "Cave Story Deluxe" section that it states that there's no Mac Installer and such. I know it's an old bundle and not that many people are going to even notice it (like how I'm a mac user and CS fan for 4+ years and I never noticed it) but... If it's still in interest I can totally build a .pkg or .dmg installer for OSX. The only issue is that Ikachan and Orgmaker is of course not native to the OS so we'll have to figure out what is going to be included.
I found some midi transcriptions of Cave Story's soundtrack on a Japanese fansite that doesn't exist anymore (died 10 years ago) through the internet archive, and for some reason I could still download all of the files from the archive.
You wouldn't happen to still have a copy of the mustache-filled, impossible to find Yellow: Protector of the Sun, would you? For years, I've quoted this game. It'd break my heart to know it was lost forever, somewhere in the ether. I appreciate your time!