A very interesting and unique experience. Despite being only a demo, it had a strong essence and signature.
The Lore feels great, the art and visuals are clearly incredible.
I do regret that it lacks some accessibilty features (text size that can't be modified, controls etc.) or some UI/UX that lacks polish (for example, dialogue boxes that superposes or dialogues not translated). Additionally, even if I enjoyed the lore and scenario, the narration felt basic (most of the delivery was with a big pile of text and a VHS). But all of those are acceptable as a demo :)
Also, on the front page, a mention of all trigger warnings would be appreciated ^^
In the end, Between the Brain and the Guts feels very promising and unique, I liked it and would definetly recommand it :D