How do I add, delete, and clear objects, and how do Undo/Redo work? | Cubik.one

How do I add, delete, and clear objects, and how do Undo/Redo work?

You can:

Clear Scene (left panel button) to remove all objects.
Delete a single cubik by hovering it and clicking Right Mouse Button (RMB).
Use Undo and Redo (left panel buttons) to revert an action or bring it back.