Oh wow, the last version is so cool and dynamic. I like that the big snake instantly pops from the background so it reads immediately.
If you want some advice I'd say that the canvas cutting the sides of the snake are working as little bit as tangents, maybe you should try either fitting the sides of the snake into the canvas, or extending the snake more to the side, so the canvas is not just cutting just a little.
I like the idea of the eyes as well, but they are tricking my mind into thinking that are two fron eyes into a side face, so maybe rising the second/bigger eye woulds solve that.
I hope this helps!