That's a fun concept !
Very luck dependent though, as sometimes you get the mice inside a loop and you win, or sometimes you keep spawning at the opposite side giving the snake all the space it needs, and sometimes you spawn right next to it and die immediately.
I feel like being able to see the next few spawn points and in which order you'll get there would steer the design more towards strategy.
You could potentially have the spawn points and the snake be hand placed to turn it into a puzzle game ! And if you don't get the snake by the time the last mice gets eaten then you lose.
Anyhow I liked it, my best was 13 mice, and my worst was like 35 haha.