Hmm... Has anyone made levels for Cave Story by making the tile set itself the level, and just placing the tiles in the exact way that the tile set is layed out?
<a href='http://puu.sh/jzDxD/7bda1d414a.jpg' class='bbc_url' title='External link' rel='nofollow external'>I'm contemplating whether or not this is the worst decision of my life</a>