The interface could be more helpful while building

[danielvictor]

You can only use a converter Gizmo while building - ok. But the interface is somewhat unhelpful.If you need to convert a colored ball in order to build a Gizmo,it doesn't volunteer the necessary conversion.It tells you that you don't have enough balls of the correct color,instead. Only when you click on the converter Gizmo will it allow you to do the conversion. That's ok for experienced players,but unhelpful for beginners.