Cool... boy man.
This is a pretty decent representation of the original version of Tetris, although it would have been pretty cool to have the mode selects (A or B) as well as the music selector (I'm a humble fan of Type B rather than A; feel free to leave out C though). The music loop isn't bad, but it has a weird loop ending which kind of takes away from the flow of it all. Otherwise, it still follows all the same game mechanics that I loved from the original, so thumbs up to you.