Hmm, probably what's happening is that something is failing to download correctly. Not sure what exactly is happening though; if this happens again, please do this: press Ctrl+Shift+* on your numpad (that is, the asterisk on your num-pad, while holding down ctrl and shift). The Debug Console should pop up. Scroll to the bottom and see if there is anything that looks like an error message, and please mention that here!
Also please mention whether this is the web version or the download version -- the web version can sometimes take a LONG time to load a scene. However I doubt that's the problem here, because you wouldn't hear nature sounds while it does that. I'm guessing Vee is having a different issue, Vee are you using the web player?