It marks a departure from the folk-influenced, lo-fi sound of her previous two EPs, Lice (2018) and Patched Up (2018), incorporating a wider variety of instrumentation and exploring a range of genres.

[1] The conception of Loveworm dates back to November 2018, where a video posted to Bea's Instagram captioned "Another song I wrote eeK" shows her playing an early version of 1999.

Sonically, the EP is a significantly band-focused, indie rock departure from the lo-fi, folk-influenced sound of Bea's previous projects, Lice (2018) and Patched Up (2018).

[10] Alex Gardner of Complex described the EP as "[maintaining] a visceral, raw sound that balances the sweeping melancholy of '90s rock with the trademark intimacy of the current DIY style that is often the starting point for today's young musicians.

"[8] Glenn Rowley of Billboard wrote that "the new project finds [Beabadoobee] wading through seven confessional tracks with her signature languid vocals, pointed songwriting chops and jangly, grunge-inspired sound.

"[11] Alim Kheraj of i-D stated of the EP: "Her sound [...] is intimate; close confessional vocals matched with stargazy guitars.

"[10] Robin Murray of Clash Magazine described the EP as "a game-changing slice of extra-dimensional pop, with Beabadoobee's remarkable vision smeared across seven tracks."