You can change the Difficulty by One Star at a time by pressing the buttons once

This is how the game is to be played. Use Arrow Keys LEFT, RIGHT, UP and DOWN to control the snake. You can lower or raise the Difficulty(Speed) using the buttons on the left side. The Left panel also tell you about the speed of the snake on the screen. Your main target is to feed the snake with the red food available on the field. If you feed your snake, the Score (on the Right panel) would increase.
But your snake will die if it eats itself or hits one of the obstacles. To play the game again, press the Restart button on the Right panel.
Hope you have understood the rules and controls. Enjoy!!!! Press the Go to Home button to select Level to play.