Critics noted the musical improvement from their previous release, and commended Nakata's production standards and its commercial appeal.

The second, third, and fourth singles; "Spending All My Time", "Mirai no Museum", and "Magic of Love" achieved similar success, put peaked at two on both record charts respectively.

[3] Two months later, Perfume announced their established self-titled vanity label that would co-release all of their material with Universal Music Japan.

[8] The material marks Perfume's fourth consecutive studio album to be fully composed, written, and arranged by Nakata.

"[10] Noticing the "cohesiveness" of their music, Nia from the publication Selective Hearing had commented "The girls of Perfume remarked how Level3 was probably their most dance-able album.

Perfume member Kashiyuka further elaborated; "I enjoy recording our albums more than standalone singles because we get more songs!

However, due to intense work schedules, Perfume asked Nakata to create normal dance music.

[16] As Perfume began to focus their activities on an international level, Level3 places some emphasis on English language lyrics; according to the lyric booklet provided by Universal Music Japan and Perfume Records, "Sleeping Beauty" is recorded completely in English, as is the majority of "Spending All My Time".

When I'm singing along to the melody, my accent becomes more Japanese – like katakana-speak, so I'm wondering what people outside Japan will think when they hear it..."[17] Both Nocchi and A-Chan also found it hard recording the song in English due to their "shy" nature, but A-Chan has previous history of using English language and found it slightly easy.

[17] The album's opening track, "Enter the Sphere", is a rework from the entrance music on Perfume's first world tour; the re-worked version utilizes electro house beats and melodies, with the lyrics wanting fans to enter the world of music.

[10][11] Tracks like "Magic of Love", "Clockwork", "Dream Land" and "Furikaeru to Iru yo" incorporate "calm" and "mellow" technopop and electropop elements.

The standalone CD format features the fourteen tracks in a jewel case, with first press editions including an obi and a bonus poster.

[6][21][22] The standalone CD artwork has Perfume inside a grey room, standing behind neon LED lamps; A-Chan is seen closer to the camera, with Kashiyuka in the middle, and Nocchi furthest away.

[21] The CD and DVD format features a body shot of Perfume in multi-coloured dresses; this look was furthered adapted in scenes from "1mm", and were printed on the 10 transparent sheets.

Now, in preparation for the American debut of Japan's big stars Perfume, we’ve completed a magnificent remix.

We look forward to continuing to pursue creative work together with them in the future.During the group's North American tour in September 2014, Perfume confirmed that they would re-release Level 3 worldwide.

[25] That same month, Perfumed also confirmed they signed a deal with North American dance record label Astralwerks to re-release the album digital and physically in the US on October 7, 2014.

[24] Regarding the release, A-Chan stated "This is the first time that someone other than Nakata-san has tampered with one of our songs, so I felt some resistance to it at first, but once I gave it a listen, it was really cool!

Nocchi commended the duo for "the care they took with our image in keeping Perfume's emotionless vocal style and elegance.

[28][29] To promote the album, the radio mix to "Spending All My Time" was released digitally in North America and Japan.

A staff editor from CD Journal was positive in their review, commending album's "dance-oriented" composition and labelled that its overall appeal "shines".

He went on to say "The bulk of Level3 feels like a live-show preview, but with enough great sonic moments sprinkled throughout to make it enjoyable at home, too.

He commented "Everything is extremely well balanced [...] all of these aspects are present in Level3 and perfectly mixed together, maintaining a constant Techno/Dance soul that guarantees a clear personality to the entire album.

"[11] He concluded "Level3 is the past, the present and the future of Perfume, the perfect portrait of this group and of their long and successful career.

[11][47][48] It achieved success in Japan, debuting at number two the Japanese Oricon Singles Chart and lasted for twelve weeks.

[51][52] An accompanying music video was shot for the singles; it features Perfume dancing and singing the song in a robotic laboratory.

[54] The song received favourable reviews from music critics, who commended the group's English-language attempt and praised the production and composition.

[57] Yusuke Tanaka directed the accompanying music video for the single, which shows Perfume dancing and making gestures in a locked room.

[59] The song received negative reviews from music critics, who felt it was childish and interrupted the composition sequence of the album.

[62] Tanaka commissioned the accompanying music video for the single, which shows Perfume inside a comic book–style world.