The snake is able to turn by 180 degree and dies

[Diranus]

The title already says it.

How to reproduce (example, works in similar matter for all 4 directions):

1. Let the snake walk right.
2. Joystick down
3. Joystick left BEFORE the snake made his first step downward -> U-Turn -> Running into himself -> Game over
   This can happen if you accidentally pull your joystrick diagonally.

In my opinion, the snake shouldn't accept the joyleft before he made his first step downward.