I wish there was a screenshot of a demo app. How do you market a UI toolkit without any screenshots of what I can do? I'm not going to build a demo project to see what the UI looks like.
I guess, for Alpha stage they are not targeting wide audience but mostly people that are familiar with Compose (or wanted to try it).
In most cases you can just copy-paste your Android UI layer or make it cross-platform (like in this code-viewer example https://github.com/JetBrains/compose-jb/tree/master/examples...)