https://prettycure.fandom.com/wiki/Pretty_Cure_Connection_Puzzlun
Pretty Cure Connection Puzzlun (プリキュアつながるぱずるん Purikyua Tsunagaru Pazurun)? was a puzzle game for iOS and Android, based on the Pretty Cure franchise. It was released on March 16th, 2017 and ended its service on June 2nd, 2020.
It was advertised as a casual one-stroke (一筆書き hitofudegaki)? game. The more puzzles you complete and the more cards you gather allows the player to expand their roster of playable characters.
The theme song, which plays on the title screen, is Connect! (ツナガレ! Tsunagare!)? by Riro.

From Futari wa Pretty Cure / Max Heart till Healin' Good♥Pretty Cure