Bill Bodkin at Pop-Break opined "Hearkening back to the sound of the Blue and Green albums, and even some of the Red album, 'King of the World' kicks ass with classic Weezer crunch." Bodkin also praises Rivers Cuomo's songwriting for the song, stating that he writes with "hope and feel-good vibes". Chris DeVille at
Stereogum described the song as "[feeling] like ’90s Weezer with room to breathe". ==Live performances==