I agree with Clippy here about caves. And I would love to be able to steer left and right a bit. Maybe experiment with that.
How I imagine it (or would love to see it happpen), it could be a continuous (maybe with save points) constant movement adventure where you travel through sinister, atmospheric setting, like starting over a village at night, day comes, you enter the mountains, then the cave, etc...
The idea of a meditative, a bit dark, continuous game is lingering in my mind for some reason.