I see. The entire engine is set to run at 60 frames, so I'd have an insane amount of work to adjust every single event in game, in every stage, to work with a delta in time from the previous game loop.
Can you try to make a link to the exe of the game, open the link properties and add the command /MIS1 in the destination field after the double quotes of the game path? The command will tell the game to run in "machine independant speed" mode, and maybe that can solve your problem.
It should look something like this:
"C:\BLAH BLAH BLAH\Sonic3D2d 1.02.exe" /MIS1