Variation is the key. You can use the elements to form all sorts of critters and shapes. One the biggest advantage of vectors is the ease to edit. It’s easy to change existing objects to form something new.
I like to keep certain elements in separate “library files”. E.g. the curvy triangles would be in a “fury stuff” file. Whenever I need something similar, I can take if from there, alter it and save a lot of time. Usually, it makes more sense with mor complex objects or a large number of variations of one shape. A better example might be the eyes because they are frequently used and based on the same principle. A sheet with 30 different styles of eyes is a big time saver.
Create a variety of shapes by changing the curves of the triangle shape. Duplicate these elements to create variations e.g. fur a furry critter…