Use animation with more frames

Currently SimpleSpriteAnimator component/script handles the 2D animation, but you also can use Unity
animations and sprites (there are lots of tutorials, f also in youtube) In case you'll decide to use SimpleSpriteAnimator - you should update it properties accordingly to frames in your texture:

framesMatrixSize - Frames spreadsheet size (number of columns and rows)
framesChangingSpeed - How fast frames should change each other:

For example if in your texture frames arranged in spreadsheet with 10 rows and 20 columns (frames per row)
- values for framesMatrixSize should be X = 20, Y = 10.