Lumina is ridiculously cute! I love the parallax scrolling on the backgrounds, the eerie music that goes super hard, and the simple concept of an auto runner wherein the adorable vampire girl main character is trying to outrun the light.
As for constructive feedback, a lot of old school platforming games I think players would expect simple collision, but there were a handful of instances where I found the character had gotten stuck from jumping in a manner where it rubbed against the side of an object, especially the crosses. I also missed having sound effects, I saw a sound credit so I'm wondering if perhaps there are sound effects that glitched out?
That said though, I think the second stage, the hospital, looks so striking with its contrast between GB black and green and the bright reds, plus the music on that stage is magnificent!
I look forward to seeing what you all come up with next!