The first thing which caught my attention was the prose. It was descriptive and vivid, conveying the feeling of being caught in a trap and the rush of feelings which flow through our vampire protagonist as they work a way out.
Radiance Inviolate is short, but there is some branching as you try to figure a way to free yourself before the sun comes for you. There are some flashback scenes which explore the setting and vampirism further. You might encounter someone who could help you, or you could try to force your way out.
I won't spoil anything, but from a visual standpoint, I did like the ending scenes.
I thought it was a good short read, worth a few playthroughs to try out the different choices.
Also, if you do play, don't forget, sometimes lying doesn't solve the problem.