First, go into the project by pressing the SEE INSIDE button and pick a cat. Once you've found the cat you want, select it and go to costumes. Decorate your Warriorcat and then press remix to show everyone your cat. Keep making a remix chain project after project, I will add more cats eventually, probably when everyone has done a cat.
Credit to @spotteddeerj and @Jubilee2007 My cat is the red one at the top right corner.
