According to the somanychoises you need a newer flash player to get it to work... Though it would have been nice if he put that in the Description and maybe even a link.
If your going for the last badge don't worry about collecting all the acorns. I only lost a furry on 1-3, 1-4, 2-2, 3-3, and 5-2. I'm sure somebody else could do better, but that gave me the 25 I need.
I think the lone survivor badge should be hard but it probably isn't because the creator has a walk through in his description. The cat part is just Wrong!