Pixel's soundtrack for unknown game?

So in May 2014 i'm downloaded Pixel's site via Teleport Pro, and, i find... "wharf.mp3" and "boss.mp3". It has low bitrate and looks it's not never used by Pixel.
Currently this MP3 files is deleted, but i still have it. I don't sure. Maybe, it's from Gero Blaster, or not...
...Rockfish? How i know, it's uploaded in 2011.

You can download it from here:
http://www.mediafire.com/download/885xislx4c5kbno/boss.mp3 (Boss)
http://www.mediafire.com/download/v9ckvp9cet9hn4a/wharf.mp3 (Wharf)

 

Boss seems to remind me of Oppression but it could be something different.
Wharf sounds water-level-ish...

 

I don't know about boss, but wharf I downloaded years ago back when he was still posting dev blog updates for rockfish. It was from the second rockfish dev blog, dev blog number 3 I think.

 

Both are from Rockfish.

Here's an archive of both dev logs:
http://www.cavestory.org/page-archive/dev1/
http://www.cavestory.org/page-archive/dev3/

You can see both files are linked from there. boss.mp3 from dev log 1, and wharf.mp3 from dev log 3. I should note that Rockfish from dev log 1 and Rockfish from dev log 3 are very different games.

 

http://twitpic.com/9z6iy2

Somewhat off-topic, but here's a sprite sheet from Rockfish posted by Pixel.
I think it'd be cool if someone tried making a Cave Story mod with it.

 

is that red thing supposed to be a frog mixed with one of the slime critters?