Btw if you want to fully dive into tweening: you are going to need to break up every detail into its own layer. In this case, I have each of Twix's bangs separated and her eyes from her pupils.
Here is another examples of tweened twix, This is slow in slow out. slow in slow out is one of the most common easing used as that is how organic objects move. The motion I wanted to go for was that She starts just off screen and pops into place for a surprise.
Curves are simple enough to understand: the slope determines how much movement happens in each of the frames you give a tween if the curve starts flat and then goes steep (ease in) it will start with little movement but adds more each frame until it reach a high speed and reaches the final frame.
