My idea for a dungeon based game

The dungeon is very well known in most RPG's. With that in mind I have a idea to utilize massive interactive dungeons with narrative based gameplay. Im currently making the sprites and would love for some tips and ideas.

I'm not exactly a game developing vet by any means but I think it's important for you (and every potential game dev) to have a more substantial base of ideas of their own before they resort to advice. I'm not insulting or anything, but I think you should have more confidence in yourself and have a more defined direction. Nobody can guess what will work best from your work better than you after all.

What, do you mean here? 'The dungeon' could be any number of things. A cave, castle, forest, inside someone else's mind/body, etc.

Massive: okay, you want the dungeon to be big. Why, other than just say 'look how huge my dungeon is!' The better your dungeon is, the smaller it probably can and should be - particularly if the design is mentally taxing. How many minutes does it take to get through?

Interactive: what do you mean by this? Switches and floor tiles a la The Legend of Zelda?

Narrative-based gameplay: you mean instead of fighting battles you're telling a story? What is it that the characters are doing in the dungeon? What are the players doing?

The explanation of the idea seems a little vague. It doesn't mean you don't have a good idea, but I just don't understand what you're trying to accomplish.