Mario 3D World is different than an ordinary 3D Mario game like Odyssey or Sunshine. Think of it as a 2D Mario game, in a 3D environment. You start each level with the end being you reaching the flagpole. It's a very linear experience but it is a blast to play in single and multiplayer! The music is phenomenal and the platforming is a ton of fun to me personally. So it's a very casual game if you're looking for a good time with yourself or with friends.