The original Tetris game was decent. The original Tetris music was awesome.
My favorite Tetris music track.... after the Korobelniki (Korobeiniki).... was Moscow Nights. Two Guitars was also good.
And yes, admittedly... those catchy original Gameboy soundtracks were..... (surprise!) Russian folk themes originating from the Soviet Union. The one exception is the title song Korobelniki. That song existed before the Soviet Union. It was a folk song from the Russian Tsarist era, the folk song possibly dating as far back as the mid-1800s.
The rock band Ozma, which I stumbled into on iTunes..... made a hard rock rendition of The Korbelniki, the title song of the Tetris universe. Give it a listen.
Here's a bonus for OG Mac gamers (like myself)....
On Youtube is the original soundtrack of the Spectrum Holobyte Tetris, which first appeared on the Mac Classic. Literally one of the earliest Tetris games to appear on an Apple platform.