I've remembered the UI being identical, that demo button on the bottom.
But something that was completely different, was it's levels and marble skins.
Music was also completely different.
This was 2001/2003 era I believe. I was pretty young back then.
Marbles were glass, they weren't opaque.
I remember one that was green, with pink aura in it.
Another one outside grey, different shape, inside pink.
If it's even the same game, probably not, I remember this one having demo mode too where I'd watch a replay in the main menu.
There was this graveyard level with a big tree in the middle similar but yet different from that pic on the website.
Levels weren't completely on the open.
Some were more or less closed look alike.
Pads where the marble starts were blue, I also remember that.