>>26363
The bouncing is pretty good, the flash at the beginning is a nice touch. After that, I'll be overly critical. Sorry.
At the start where the ball is misshapen and moving slowly to the left, there is a black arc on it. It looks like the ball is squeezing through a hole, but it took me some time to figure that out. It should be easier to tell what's going on. So the drawing is not conveying what it is supposed to be.
The ball shaking after that is possibly the worst drawn part of the animation. The frames are messy non-circles that are not misformed to show a physical effect, but simply misformed. This can imply chaotic behavior, but here it just looks messy.
The ball shakes and deforms while it hovers in place. This is not as messy as the last part, but it's still messy.
When the ball hits the the right wall there is a frame where it shaped like a half-oval. It is supposed to be distorted from hitting the wall, but it looks off to me.
Just after that, the ball is drawn straight horizontally for a frame. It should be at the angle that it is coming off the wall. Make these two frames look like they lead from one into the other and it will look better.
It looks like it hits some object in midair that is invisible and bounces off of that. If that is intended, great. You can add the object to the next version of the animation.