Angry Birds launched in 2009 from Finnish studio Rovio and became one of the first huge mobile game hits, built around slingshot levels scored with a one to three star rating. The star sounds play during that end-of-level tally, with the second star marking a solid clear rather than a perfect run. As gameplay clips and edits spread on YouTube and TikTok, those short UI chimes were lifted as standalone reaction sounds, and this two-star ping survived as a shorthand for okay, good enough, and almost there.