I rated it 5 stars on creativity. Even after pressing spacebar a couple of times and trying to rotate and move I was not sure what to do. I did not have any idea about how the topography was around me and only saw some waves. Although the idea is creative, I am not sure how the gameplay works. Maybe the sonar needs to work in a way that players would know where to go.
Maybe this critique will be helpful when you finish this game.