The Emoji are licensed under CC BY-SA. You can use them for any projects as long as you include credit to 3moji.org! Have fun creating!
You can download the developer package on github. Currently it includes, gltf, glb, fbx, png images, and a csv file with mapped names and unicode characters.
If you do start to use 3moji in a project you should know that there could definitely be some small errors like flipped normals or incorrect scaling. If you find something let me know at email@example.com! It Helps me make the library better.
Also I would love to see what you're building, so feel free to share your project! 😄