Thanks for the suggestion and for supporting the pack!
I spent today making an outfit with a long-sleeve shirt, pants, socks, suspenders, and orange Chuck-style shoes, all animated for the 4-direction idle and running animations. Hopefully, this and the original shorts-and-tank-top on the character give you a good starting point for creating your own clothing variations!
Thanks again for the feedback—I hope to add more outfits in future updates!