Can not see the imported code

Hi all 

I created a local library and import to another project to use it as following:

As you can see the library is kafka-api_2.12-0.1.

When I want to take a look at code on the kafka-api_2.12-0.1 library, it shows: 

Not as structured code, but rather in spaghetti code. As you can see, there is a download button, what does it mean?

What am I doing wrong?  

Thanks