Wellcome to pixeljoint. The animation is pretty fine as is, but if I look for things to improve, I think the shine effect on the right left should deform more to follow the curve of the blob as it moves.

I mean, there's nothing [i]wrong[/i] with the animation: it's a bouncy blob of acid with some... thing? inside of it, and the squash and stretch is fun to watch.

If you want some minor improvements - I would play with the shape of the highlight, and have that shift along with the contours of the blob from frame to frame. And, on a more pedantic note - you could definitely cut down the color count here. There are ten shades of green, some of which are very much redundant.