I like the concept of eat the rats to make stealth easier in one way, no more rat, but harder in others, longer and easier to detect. The issue I found was its almost never advantageous to eat the rat, better to just avoid.
I think the snake always moving forward is a bit unnecessary for a stealth game. I'd like more agency and bumping into crates and walls to hide feel clunky.
The horn for getting caught gave me a chuckle. Good job!