I've had a bit of a snag as I have been hunting down custom resources for the bonus dungeon areas of my game. Since the assets required some custom editing and some mix and match optimal use in VX Ace (and it took a few tries to get it to look right), I've had a bit of a delay, but most of the graphical side is far behind me.
The music is now my remaining concern. I wanted custom music for this section to emphasize how much difference there is between the bonus dungeon and the rest of the game, much like how the Culex bonus boss in Super Mario RPG just stood out due to is dramatic clash with the rest of the game.
My biggest issue has been hunting down resources that were available for use that fit the theme, and I've finally found some worthy candidates, hope to have my music score picked out and ready to go soon.