don't see "hue shifting" as a techniqu to apply. It's a super simplistic rule of thumb for much more complex concepts which come with color temperatures, light color, reflections, subsurface scattering and much more.
The appaerence of the slime shifted because a milky white as a color behaves different than putting in a quick hueshift.
That being said I can't see anything wrong with the colors. And the outline also seems fine to me.
But colors are ony one thing and shading and the usage of them is another field. Your shading is just thrown in and doesn't follow the spherical structure of the shape. Therefore it looks really flat.
you could get an image of a waterdrop to get an approximation as a starting point and try to learn the principles. That being said translucent transparent materials are much arder to shade than something solid with a bright color e.g. plaster. Which is the reason why art training usually starts with drawing plaster cast studies.
e.g. google for "water drop on leaf"
Also consider the form of a waterdrop, there should be surface tension, especially connected to the ground
a little edit just with those minor form edits, keeping the exactly same colors and reshading: