This was awesome and incredibly mind bending. The minimalist graphics were so nice and then the multiple snakes blew my mind.
I only have two small nitpicks. 1. I wish there was WASD controls. 2. I would get thrown off when the whole playing field shifted when a game-cell ended. I think it would be cool to just grey out that cell and, next time you add a new cell, just replace that old cell. Of course, this could work way better in my head and end up filling a ton of screen space. These are both super small nitpicks that don't even take away from the experience of the game.
Wonderfully simple and fun. Great game!