I had an idea that I was kicking around for a sort of alternate reality/video game. It would blend lucid dreaming with gaming, in such a way that part of the action would take place in the dream and part of it would take place in the game. There would be puzzles that would contain elements that can only be solved by integrating the game and a lucid dream.

A very simple example would be this puzzle solving idea:

You are in a room, with an automatic door that is operated only by a switch. The switch is located on a ledge high up in the room that cannot be accessed in the game. To solve the puzzle, the player would have to put themselves in the room in a lucid dream, and find a way (such as flying) to reach the ledge and activate the switch.

I am still kicking around the idea. Anyone have any other thoughts? If the game is engaging enough, it would be easy to dream about it, especially if played just before going to bed or as part of a WBTB.