Clawed my eyes out
I thought it was cool how you could actually hear the chants of "help" through the speakers. Then I realized that it was not coming from the game, but instead from my own wearied and desperate throat after dying for the 70th time on the same level.
I think it is a cool concept, and I definitely appreciate the innovation, but personally it was just too much. Even the walkthrough seems to stumble on some of the levels.
I was really determined to finish the game, but after about half an hour, I realized it was not a game anymore. It was a marathon. Each level is monotonous and equally frustrating. Also, I understand the concept of the ball, but it rarely actually worked for me.
Instead of using the sonar/ball, I found the gameplay so difficult that I played this game almost solely on a trial and error basis.
I cannot stress enough that it is an interesting game because of its very cool concept, and it was this that made me so determined to try to finish.
However, I only recommend this game to anyone with a lot of patience and a deep sense of masochism.