My suggestion would be putting a little extra thought in the character's design, like for example you make a pink dog...but what is that pink dog most good at? What does it do as a job? Where does it live? Is the pink dog hyperactive? Shy? Grumpy? These little things are very important in the game's character designs. I mean, cooking cat is a mellow, friendly guy who likes cooking so he wears a chef outfit and has round shapes in his design!