Dude :(
So so for me, like a slideshow.
I've got a similar "moving frozen slideshow" on some other Sonic Worlds game, but it was only on a menu, not on the exact game.
Yep, my PC is way old, but it should fit a 640x480 Sonic game.
It's Core 2 Duo
The problem should be with the engine, but I dunno how to even search for it. They've took an awesome unique name for an engine.
I will make any tests or whatever, If you'll try to figure out the problem. Thanks for a game, I will play it... somehow and some time later