Hi TinkerTyler,
Thank you for your genuine interest in the game! =)
Adding additional costume to the game is a frequently asked request, however, as a programmer myself, it is not very cost-effective for me to add new costume for the game (for reference, I’ve spent more than 2 months on adjusting and re-skinning the protagonist model, a model which I bought from online marketplace; with the same amount of time, I could build a new level or add 2~3 new mechanics to the game).
A plausible alternative approach is to add accessories to the protagonist - things like earrings, headgear, or armor plating which does not require additional skinning work from me.
If I decided to add an accessory system or other similar system to the game, I will make sure to update that information in this thread!
Thank you again for your interest and love for the game, have a nice day! =D