Hey,
We retablished the download button. We had to stop downloads to fix an issue. You can now download cubeOS from itch
Sorry for the late answer and inconvenience.
Sorry again for late answer,
When you download something from the store it will show you 100% which means the download is finished (You'll find a ".ccn" file in the same directory as cubeOS executable, that's the Game/App you downloaded)
In order to launch it, you have to access the cubeOS Store Game/App Launcher (you can find in Desk) and Select that file.