2D Snake game in C++ using DirectX9

This is my first 2D game. It`s written in C++ using DirectX9 (Direct3D and DirectInput). This is a very simple Snake game. At the beginning the snake is only 1 square long and when it \"eats\" the target it`s length is encreased by 1 square. The snake can have a maximum of 20 squares long (each square