Hoop stack is a ring sorting puzzle game to keep you entertained for an hours. Water color sort puzzle games are no longer unique, that's why here is a new concept in the sorting puzzle game with colored hoop stack. Hoop Stack,color sorting puzzle game,ring sorting puzzle,arcade game,puzzle game,brain game,casual game,fun game,funny game,hypercasual game,color matching,3D game,Unity3D,.io game,mobile game,educational game,spatial reasoning,problem solving,color puzzle,stacking game