Brainstorming Help

Hey I am looking for help with brainstorming an idea i came up with recently for use in a Inform 7 project. While all help is welcome it would prefer help from someone who has some experience writing be it with interactive fiction or not. I have already begun programming but wish to expand on the general idea, the idea isn’t far developed and can be changed drastically. Also I need to keep it within reason as I still need to program it. I cannot submit the full idea on the board as I might wish to enter the game into a future competition, i can provide a few details. The story is set in either a fantasy or ancient real world, with little elaboration on the plot given to the player but rather revealed through dreams and flash backs, it is going to be heavy with story telling as opposed to gameplay. All help welcome, if you want to help PM me here.

Thank you.