Have any of you ever played the game Braid? For me it is one of the better games out there and for my personnally has a strong connection to lucid dreaming. If you’re talking about riddles and puzzles it’s one of the best games there is and it could be a good inspiration.
Anyway I think you’ve got a great idea and I would fully support. I’m not good at gamemaking or ever gaming myself but I have done some work with Gamemaker and I worked on a project as graphic designer and music designer. I’m absolutely not an expert or anything but If you would need some help I’d be happy to.
I do know that you will carefully have to look into everything; gameplay, levels, missions, graphics, art, music and sound to create a certain atmosphere or idea behind it all.