I’m not an expert by any means but I studied your clip a bit and figured sharing my notes would be better than not. This is just looking at it from an animation point of view. Take the following with a grain of salt as I’m new to the animation scene as well Here goes:
I think something that will help is to just track the tip of the frog’s nose. You’ll see that his point hits a lot of “walls”. One noticeable part is when the orange snack? hits him on the head, his head comes down and doesn’t recoil back up. Instead it goes down, stays level and just slides to screen left.
Spacing on the head-shake if you track his nose again you’ll see the same issue.
Minor detail here but when he lifts his head I feel like the body should come down first and the head might come up a few frames later in an overlapping action. At the moment it hits at the same time and feels slightly stiff.
When he drops his head down to turn and look at the orange snack - tracking the tip of his nose again will reveal a very wonky arc. The overall weight shifting could use some work there. If you look at how his limbs act frame by frame the hands slide around a little oddly.
Track the body of the frog as he does his jumps - instead of moving in a parabolic arc he seems to be hitting points in a shape more resembling a trapezoid.
When he licks up the treat it doesn’t seem physically correct that it would flip backwards like that. I imagine it would flip forward based on the contact of the tongue and his motion. When he leans back to catch it - be careful again of his body hitting an invisible wall. And if you track the position of the treat you’ll see it also hits an invisible wall. It’s moving at a particular speed as it’s in the air but when it gets above the frog it loses all forward motion - which seems off from a physicality point of view.
Because it goes by so fast and motion blur has been added its a little hard to see but when he falls over there’s a little bit of slipping happening as the body contacts the rock.
Overall it’s a pretty strong piece and it looks really nice in the render Hope this helps and good luck!