Sonic Spinball says hello.
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Spinball isn't that bad, just insanely unbalanced and tedious. Blast GG has simple things like hit detection completely screwed up.
I could never beat The Machine.
I liked Spinball a lot and played the heck out of it when it came out new.
The GG version though...well...it's a blurry, uglier version of Spinball. Nothing more, nothing less.
I was surprised R was decent. However, I'm also aware that the PC version was upgraded, and it really shows. It seems to take advantage of the C-stick (I know the original R was compatible with the analog pad; I think some of the bad reviews that mentioned the controls may have only used the D-pad) and feels pretty good. Kind of clunky in places (just try turning around from a stop), but a pleasant surprise.
StF is pretty much what I expected it to be--Sonic in the Fighting Vipers engine. That's pretty much exactly what it plays like, and the rubbery effects when the characters attack/get attacked are really cool.