I like the echolocation mechanic! It also provides great feedback as we do it, so we can see where the obstacles are. I have a suggestion that maybe you could reduce the speed. For me, the bat speed is pretty fast because when echolocating, I know the obstacles are there, but the bat is too fast, making it difficult to avoid, and I end up hitting into them. Overall, this is a great, well polished game! Good job!