Excellent graphics and gameplay! Playing it for the first time, it only took a few minutes to crack my top 3 favourite tetris games[1].
1. graphics: very colourful and detailed
every tetris piece has its own colour
beautiful intro screen
2. gameplay: outstanding!
holy cow, 5 modes: one player; 2 player; vs cpu; 2 player collaborative; cpu collaborative (collaborative = you share a single, bigger playing field)
in single player mode, the distribution of pieces is presented as a histogram on the side
difficulty and handicap settings
3. music: acceptable
absence of the famous tetris title music, but 'Troika' is a decent alternative
[1] New Tetris (N64), Tetris Battle Gaiden (SNES), Tengen Tetris (NES)