Google Play Store has just received an update. The new update comes with a new user interface probably aligning with the just launched Android Marshmallow. Some of the buttons are now curved instead of rectangular.
If you look closely, you’ll notice that the many categories have been cut down to just two :Apps & Games, and Entertainment. The former houses Games and various other app sub categories, while the later carries Books, Movies & TV, and Music sections.
The refreshed Google Play is hitting Android devices, so be patient. Yours will come soon enough.