It may not be the same Sonic the Hedgehog formula, but Sonic Pinball Party is a very fun and memorible game.
Sound: This may sound dumb, but Sonic pinball party is a perfect clash of pinball sounds and Sonic sounds. It makes a great combination.
Music: I really love the music in this game. It's so fast pace and it really is fun and fast. It has such a Sonic feel (especially borrowing aspects from other Sonic games) and it just works well.
Voices: no comment
Gameplay: Ok, so it's pinball and it's Sonic. Worked so-so in Sonic Spinball, right? Well now this is a Sonic-pinball game worth playing. If you love the Sonic Advance series (especially Sonic Advance 1) then you'll love this game. If your a SEGA fan then you''ll like the borrow aspects from both NiGHTS into Dreams and Saba de Amigo.
AWESOME!