The "16+" refers to the age of maturity and the loss of childhood innocence, described in the lyrics as the "sour taste of childhood".
You can find "Blues 16+" on Apple Music and other major digital platforms. bi 2 bliuz 16 skachat besplatno mp3
The song explores the "slippery meaning" of life and the feeling of being "stuck in the clouds" while the planet seems to "slide into the abyss". The "16+" refers to the age of maturity