Thanks for your feedback, you are absolutely right that there's improvements to make on the input and manipulation side of the UX. We also plan to have a better menu in the next few weeks.
Thanks, you are right on point, we plan to have more feedback when snapping pieces! As for muting music, we will at some point have a proper sound menu so you can balance music, sounds effects and sounds coming from the models themselves. It will probably be when or just after we change the UI for a proper menu system.