First Try Opening .apk files

[ProgrammerInTraining]

I am trying to reverse engineer 8 Ball Pool by MiniClip.  This is my first attempt at reverse engineering an android application. 

 

However, I am having issues doing so.  I have tried to open the .apk file using 7Zip and it says it is empty.

I have tried to extract the .apk file using 7zip.  It extracts but extracts as an empty folder.

I have renamed the .apk file to *.apk.zip and extracted that way but the same results occur.

 

Am I missing something or am I unable to do this?

 

I am running Win 7 x64.

 

Thank you.

[GameAware]

It should be 'filename.zip'

Not 'filename.apk.zip'