When I first looked at this, I thought it was just going to be a bunch of blank spaces at first. I guess I'm glad it wasn't. It's hard to really know what to say about this. I had no idea you'd actually show most of that. You did eventually stop the film before he reached the end. There could have been something really cool happen at the end when that happened.
This music just suits everything so well. The turtle himself is drawn in a fairly good manner. He seems much like any other turtle. The grass is nice and green. You should have done it until he got to the other side.