New version uploaded. v1.4 - Improvements and Joystick supports

In this version 1.4, have been corrected several bugs and developed improvements.

1. Support for Joystick Kempstone and Sinclair

2. Snake now has colours that change depend of the level reached.

3. Have been implemented two game mode, EASY and HARD.  In the second you don't walk through the edge and the snake could bit herself.

4. Try to solve the problem with apples and scenary, because sometimes apples is generated over the obstacles. Under testing!

Enjoy!