Do chinchillas really make that sound? I mean, I've had rabbits that make a similar sound when they grind their teeth, but...
Anyway, a lot of effort was placed in this (particularly the backgrounds), but it could use some touch-ups here and there. One such spot is after the chinchilla placed the soap on the pedestal, the music appeared to have 'hiccuped' after it faded out.
One of the benefits of having a simple designed character is that animating them will be easier and I noticed that you made it even more easier during that spiral dive. At a certain point, you mirrored the little guy so you only had to work with 180 degrees instead of 360. Understandable, however, that strap on his chest is what gives your trick away and the illusion of him spinning suffers because of it.
It's still a very nice animation, but some cut corners and slip ups were obviously noticeable.