Applying the previous tool, try to create the next layer, belonging to the nostril.
The layer’s parameters: Blending Options>Gradient Overlay
Combine in a group all the layers composing the nostril (it’s necessary firstly to press Ctrl button for choosing the appropriate layers and then hold on the left mouse’s button to move down the marked layers on Create a new group solution). Make a copy of the new made group and choose Free Transform option to place the copy as it is indicated next image:
It’s time to use the Ellipse Tool (U) to draw the emoticon’s mouth. For the beginning we’ll draw the element’s basis and then press Alt button while using the same tool, to cut out the unnecessary elements. The layer’s color is black.
The layer’s parameters: Blending Options>Bevel and Emboss