You can create the desired MENU with 3D objects. For now, you can only use the menu with the keyboard (i.e. switch options, pick a choice, etc.). You can see the great example of in-game MENU in our 'Hard Landing' tech demo. MANU Team has some plans for adding additional specific tools for creating game UI, and it will support additional menus, windows, buttons and other possible input forms with ability to use the mouse to pick your choices.