I dig it! The ultra-minimalist rules and the collaborative creation tools set players up well for making chronicling a creature together.
Favourite details: I really like "someone sees the creatures in the shadows," because it really opens the path for unreliable narration and gives the tall tale writers a great start. I also love "Entry Number," because it does a lot of heavy lifting for such a small detail in getting across the archival theme.
Would be nice to have: A few more colourful prompts could be fun! Stuff like someone falls in love with the creature or the creature betrays its kind could help give players some variety to explore. But I love leading questions, so this is my personal game preferences showing.
Anyway -- cool! Nicely put together and super compact. Pass my thoughts onto Vrakroth, yeah?