Two word game

[iggyworf]

bottle collection

 

[stumpknocker]

collection gallery

 

[iggyworf]

gallery magazine

 

[Dugout]

magazine article

 

[goodman1966]

Article Thirteen

 

[Dugout]

thirteen donuts

 

[glass man]

donuts cops

 

[Dugout]

cops robbers

 

[iggyworf]

robber fly

 

[Robby Raccoon]

Could someone explain to me the object of the game? I am not understanding well it.