Benny the Bear

Ahhh you mean Sprinkleshell, the turtle! You can feed it with blue candy. Once it is full you can click on Sprinkleshell, then click on any color and the turtle eats them. Then feed it again with blue candy, read more here: Who is Sprinkleshell

I found a video for you. In this video they clicked the green candy to remove it (difficult to see)

So the best trick is to make sure the turtle is full quickly, then click on a color you want to remove from the field (this doesn't cost you an extra move!) Continue playing and if possible use the turtle again to increase your chances win the level 💪