I enjoy the Sprite work very much, wouldn't be a character I would enjoy playing regularly or not even at all. I am not one to be dishonest with myself nor when I try to push feedback. It lacks comfort and it would perhaps deserve some QOL additions.
While I see quite quality work put there, it doesn't necessarily feel great in the air. I understand I am an oddity and a minority since I am playing with only a keyboard but Ray feels heavy to steer the jaw rotation, simply it is slower than I think would be comfortable.
There are definitely two odd additions in play a bit noisy element is the speed lines, while they give a sense of speed, they literally fly into your face. So I would recommend either making them translucent enough or not having them at all.
Instead of wall clinging (2nd oddity) I would really focus on making touching walls more forgiving, mere touch of corner can cancel out flight. While that's a thing even on the ground, at least you can be sure you are on the ground while in the air you are running into the risk of falling into the pit. And in cases of corners, the clinging function won't even run.
Maybe that isn't your fault and perhaps it already was fixed, but in my current next build of SRB2, Ray defaults to SKINCOLOR_BLUE.
I would like to say something more positive to end this quite negative feedback sandwich, but I don't want to delve into specifics of how good Ray sprites are. However, I can appreciate how Ray is vanilla-styled, I think that deserves a mention.