snake remake

features: -movement: either with all arrow keys, or only left and right press p to pause the game -boost: pressing 'x' gives your snake a temporary speed boost -once your snake reached a certain length, it can be shortened by pressing 'c' at the right moment (when the background turns blue) -movement through walls can be enabled or disabled -a highscore file is created wich contains the three highest scores Note: If you don't have the module 'Psyco' installed, edit the file, and remove import psyco and psyco.full() near the top of the file