Tetris game, stating that she "thought it's exactly the song you should listen to in summer" since it is "energizing and can play in the background for driving". Meanwhile, member Wendy compared it to their first summer single "Red Flavor" which was released in 2017 and admitted she "wasn't very impressed at first" but added "the more I listened to the song, the more energy of a different sort it gave me". The EP contains six other tracks, including an English version of "Bad Boy" which the group previously performed for the first time at KCON 2018 in New York in June of the same year. The song marks the group's first English-language release. Claire Chung of Haps Magazine characterized the second track "With You" as an R&B song underlaid by trendy reggae synth pluck sounds with a moombahton rhythm. The third song "Mr.E", which is a play on the word 'mystery', "creates the illusion of being on a jungle safari" with its colorful animal and conga sounds. "Mosquito" is a new-style swing genre embedded with strong hip hop grooves. Chung also stated that the fifth track "Hit that Drum" is an "energetic song reminiscent of a South American samba festival" with its samba percussion instruments, cool brass sounds and heartbeat-like bass lines. "Blue Lemonade" is an urban pop dance song featuring a rhythmic synth base and bubbly background sounds. Release and promotion To promote the EP, a series of image teasers were released on July 29, 2018, through the group's official social media accounts. SM Entertainment also launched an interactive game on their official site. Before its official release, the group performed the new songs from the album during their second concert 'REDMARE' on August 5, 2018, revealing them to the public for the first time. The EP was released on August 6 worldwide, with the iTunes release featuring an additional podcast track, "Red Radio", which is described as a "special audio track". An accompanying music video for "Power Up" was released on the same day. The choreography was done by Kyle Hanagami who has choreographed several songs by the group, most recently the single "Peek-a-Boo". Red Velvet also held a special live broadcast on the day of its release to promote the EP through the Naver streaming app V Live. The physical copy was released in 6 versions with one being the standard version (released on August 6)