That was a good catch, the floor really is scrolling in a wrong way. The original has "parallax textures", the top of those textures moves with a different speed than the bottom part. I couldn't implement that in time for this demo, so I had to make do with what worked.
The reflection is using additive alpha blending. Mugen in general is using a lot of interesting blending effects I hadn't seen before, so I'm learning a lot from working on this.
Anyway, thanks a lot for the kind words and for testing it!