Original idea, though I don't think that's how it is to be a bat... it's an unfiltered output from echolocation. Human brain does ton of processing with visual stimuli.
I think a view in which detected objects fade very slowly (several seconds at least) would be a better translation of bat's experience.
This is not my creation, but I've read the essay before and I was intrigued by the game. It's pretty cool.<p>Here is the essay if anyone is interested:<p><a href="http://organizations.utep.edu/portals/1475/nagel_bat.pdf" rel="nofollow">http://organizations.utep.edu/portals/1475/nagel_bat.pdf</a>