Cool game. I also did a reverse-snake style game, so clearly great minds think alike, eh? :)
There should probably be a penalty for letting food fall off the board. I managed to win on my first try by trying to keep a cluster of food bunched together, and intentionally pushing food that fell far away off the board so the snake couldn't get them.
It'd also be nice if the snake tried to move towards your food instead of randomly.
I like the 3d graphics and it's cool how the food can actually 'bounce' and get stuck in weird ways if it falls on top of other food, for instance. Nice job!