Tom Ewing of "Freaky Trigger" rated the single 9/10, saying: "There's a beautiful tension in 'Groovejet', an apt flirtation between Bextor’s languid, cut-glass vocals and the delightful indulgence of Spiller's music. It’s not just any disco he's reviving, after all. No Chic for Spiller, none of that poise or aspirational elegance. The sounds 'Groovejet' loots are the syn-drums and ray-gun synths of disco's overripe peak and decline, when it was corny, wonderful, mass-market pop music: you can hear hints of Kelly Marie or Amii Stewart in the song, before that sweetness falls back into the dreamy groove. 'Groovejet' is a fond tour of disco when it ruled the world, and proof that it still could." He described the music's sophistication as coming from Ellis-Bextor, who "offsets the track's bubbly repetition, adds a bittersweet note without ever sounding like she's above it. In fact she sounds carried along by it."