Nice
It's somewhat short, as you pointed out, but it's also nicely animated and different than what you usually see here. I'd like to see a longer (and maybe a bit slower) version.
About the flash not playing : I had the same problem but then I remarked that if you don't click on "Play" as soon as it's loaded, but instead wait one or two seconds more before clicking, then you won't have this problem. Hope that helps.
PS. Being an damned tree-hugger I have to add that composting is the best way to dispose of biodegradable refuses, so you got one bonus point for the message ;)