Only thing that you should do is converting graphics to ZeppOS-specific format, and pack you app into ZIP-archive, which will be your install-ready bin-file. To do that, you can use ZMake, which will do all of that automatically. When you got a final bin-file, you can try to install them to your band exactly as a watch face bin-file (I prefer this installation way: https://melianmiko.ru/en/posts/sb7-install-guide/)