My very first stage hack! I wanted to make this because I'm a huge Cave Story fan, and the fact that I couldn't find any other CS stages but the one over flat zone. I guess it turned out okay, but hey, it's my first hack.
If you want to try it, look for it in the vault (STGEDIT_02) or go to this link:
http://www.mediafire.com/?x5bbbyq0a3co988 
