As the Combot parts are becoming available, the player can left-click on them and watch them appear in the Assembly Bay.  When the Combot is complete and there is a Combot Crew available, the Combot may be deployed off of the platform by either pressing the "Deploy" button or right-clicking on the playfield.  Notice the Crew name that appears in the center of the Toolbar: Diego.  Also, notice the window right above the Crew name that displays the parts of the Combot that have been placed in the Assembly Bay's construction platform.