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'''''First CLU's Level''''', full name ''CL 1 – First CLU's Level'', is a [[custom level]] made by the Russian speaker '''CLU'''<ref name="name">The author, with the Russian name Веселый Клу on Discord server, specified this name.</ref>, which was released on 30 May 2019 (UTC)<ref name="time">The precise time is UTC 2019-05-30 16:56; for those who live in or to the east of the UTC+8 timezone, the time might be recorded as 31 May 2019.</ref> in the [[Help:Discord|Discord Ballance Server]].

The original file was 2.2 MB in size; however after a clean-up it the size might be decreased reduced to less than 1 MB.