This is a shortish Twine game by Els White, author of the popular Twine game To the Wolves and writer/designer under Spider Lily Studios.
This game isn't meant to be epic, just a simple love story, but it has fairly heavy world-building done through implications. I felt like it explored class politics, transitioning, gay relationships, theology, etc. all in ten minutes.
There are some nice visual effects that add to the play (you literally assemble a visual angel), and I enjoyed the time I spent playing.