It is an uptempo EDM dance-pop song which comprises "euphoric" instrumentation, a "hammering" bass line, "hands-in-the-air" synths and "pulsing" beats.

[2] "Braveheart" conceptualized "as an accident" when Neon Jungle were in the studio and "raided" their producer's laptop and found the song's beat; group member Jessica Plummer stated, "from that very second we all believed in the track".

[9] Speaking of the track, group member Asami Zdrenka mentioned, "The magic belief fairy dust was sprinkled over that song from the first time we heard it".

[10] In addition, the group have said that they "experience a lot of different emotions performing and listening to the song,"[11] and described "Braveheart" as "having it loud, pumping through speakers," adding "it's just like a rave every time it plays".

"[20] According to Michael Cragg of The Guardian, the song "refined the sound of 'Trouble' into a more club friendly, but no less characterful, mix of pulsing synths and huge bass drops".

[23] Lyrically, "Braveheart" "feel-good,"[24] and comprises uplifting themes that have been likened to American actor Mel Gibson's freedom speech from the 1995 film of the same name.

[25] Idolator's Sam Lansky deemed the track "one of the most blisteringly cool dance-pop singles in a long while," and lauded it as "weird, dark, pummeling and thoroughly out-of-the-box."

[14] Maxie Molotov-Smith of Fortitude Magazine honed the song as a "monstrous rave-ruckus" and commended the group's "in-your-face" attitude and "immoveable" confidence on the track.

[29] In a review of Welcome to the Jungle, Entertainmentwise's Nick Reilly commented: "We're grabbed from the moment that the song opens by the club sound that leads the track.

This, paired with a fantastically tenacious chorus and an unexpected diversion into rap sets the bar pretty damn high for the rest of the album!

"[30] Rory Cashin of Entertainment.ie described "Braveheart" as "the perfect follow-up" to "Trouble" and "a sexy little number you won't be able stop your body from reacting to".

[31] AndPop's Rebecca Mattina commended the track's immediate bassline, "sultry" vocals and McCarthy's "sassy" rap solo, and felt that "Braveheart" was "perfect" for electropop fans who need a "heart-thumping jam".

[20] Gay Times journalist Lee Dalloway said the track was "certainly worthy of a good rinsing on the club circuit", and commended its "well-crafted" pitch and "on the floor" credential.

[21] "Braveheart" was awarded a three (out of five)-star rating by Digital Spy's Robert Copsey, who felt the song was "a menacing club banger" and "tailored for radio," and praised the each girl band member for vocally "coming into their own".

"[26] Charly Barnes of The Galleon awarded "Braveheart" a six (out of ten)-star rating and commended the quartet's "strong vocals" on the song, but deemed the track "marmite" and felt the group should "lay off attempted rapping".

O'Brien, however, called the rap "slightly dodgy" and stated "there's little here to distinguish the track from the wave of Guetta-esque club bangers that have swamped the charts this decade.

"[17] Ian Gittins of Virgin Media highlighted the song as Neon Jungle's best and as "killer Kelis-style rave-pop", but felt it was "spoilt by shrill".

[33] On 2 August 2014, Vada Magazine's Mark Rocks lauded "Braveheart" as "still the most exciting thing released by a girl group in 2014," opining that it was "effortlessly refreshing" but dismissed the song's rap as "questionable".

Upon its chart breakthrough, Vada Magazine writer Mark Rocks commented that Neon Jungle "looked set to live up to the hype they were receiving".

[46] The music video sees Neon Jungle featured in darkened, red-and-green-hued spaces,[14] performing "defiantly" while being lit up by the illuminous colours.

[28] IX Daily's Anthony Deluca commented, "The video, like the track itself, is unapologetic, quick paced, and has the group showing off their unique sense of style.

[32] MTV Buzzworthy's John Walker opined, "While most of the music video serves as in-motion glamour shots of the girls, the severe neon red and turquoise lights give the clip an edge, keeping the whole affair from being too straightforwardly pretty-pretty.

Dianne Bourne of the Manchester Evening News opined, "it was full, arms aloft joy when they crowned their short set with 'Braveheart,' which is becoming something of a modern disco-land classic.