This is one of my favorite entries in concept and execution, the whole idea of moving a small camera or robot into a deep dark cave system, is so claustrophobic but interesting at the same time!
The whole aspect of limited movement has always fascinated me, not knowing where you will be, having to make sure every step you make is carefully calculated, maybe even having to make a map, is all so interesting to me.
The ambience and the darkness behind it are fascinating, to be honest I enjoyed this game quite a bit, would definitely come back for more!