The sides are biscuit jointed together, ensuring the grain runs up & down not across.
The carcase is biscuit jointed together although I have also used knock down fittings for the base.
The door is a simple frame using cross half checks and rebated to take the mini orb. the door support has a mitre cut on the top edge to allow the door to sit flush with the sides, the top also has a mitre on the front edge to ensure the door sits flush.
You could have a solid door and carve a design on it.