If you want to have characters in your Buildbox game, try the SP shop. I still have to make some tweaks, but it works perfectly – different 3D meshes, prices, price locks, customizable UI, etc. Fantastic support, too.
Video demo... https://drive.google.com/file/d/1zfSRi08W5--EwnpJpsURz3uD7Rkd4F81/view?usp=shari...