Sonar Places

This year I wanted to do a game again, but it was not possible due to problems in another project :( But I want to have GGJ18 in my list here, 'cause it was hugh fun nevertheless to be on site at Cologne Game Lab (CGL) the whole time, among others making fotos for CGL Student Documentation Group. My idea is placed in an underwater environment, the player is constantly moved foreward in. He / she can send sound signals and have to regard their echo to avoid obstacles, he cannot see clearly on time and orient in the world.
Jam Site: 
Jam year: 
MS Windows
Tools and Technologies: 
Unity (any product)