Nice mesh of the genres! Simple, but puzzling. Nice work!

-cd-

Quite a bit better than i expected! Certainly a 4 star game in principal. However, it took my quite a while to figure out that the backwards rule was that there had to be an empty space behind the end of the tail, and the lack of an undo button is frustrating.

I'll be honest, I wasn't expecting something this interesting.
There is a very short list of improvements
1. Can you add a diagram, that shows how reversing works. Because I struggle a little figuring out when I can/cannot move back
2. Could you add WASD controls, and/or possibly the use of the enter button to restart a level (these are just nice conveniences)
3. There's something odd about the the main menu having inverted controls, it trips me up a little
But that's it.

You have created an excellent sokoban/snake fusion, it is brilliant idea, and a few levels I've gotten to grips with the mechanics and it's bloody brilliant. And probably the most impressive thing I'll see this month.