Make a copy of the last made layer and select the
Free Transform option to turn the copy over, the way it is demonstrated below.

Using the
Ellipse Tool (U), try to make the next layer reserved for the buttons, colored in
#5AD5DC
The layer’s parameters:
Blending Options>Outer Glow
Blending Options>Stroke
Gradient’s parameters: 

Make one more layer on the surface of the recently made one, selecting the
Ellipse Tool (U) of white color.