The "com.unicostudio.braintest" part of your query is the official package name for the Android version of the game. The preceding numbers (67.139445) are likely related to a specific internal build, advertisement tracking ID, or a localized versioning system used for distribution.
While the exact numbers in that string appear to be technical identifiers, the "story" behind this game is one of unexpected global success born from simple schoolyard nostalgia. The Story of Brain Test 67.139445_ww.pl.com.unicostudio.braintest
Through clever playable ads and simple, humorous graphics, the game reached the top 10 in global rankings and surpassed 100 million downloads in its first year. The "com