Matlab Space Invaders VideoGame

Version 0.1 (beta, so please, give feedback).

This is a game and also an example of how to read/use keypress
functionality from figures.

This is a tribute to Space invaders[1], without any lucrative pourpouse.

The game opens a figure with the spaceship that must land on the square
avoiding hitting the land.

Use the arrows to move the spaceship and the spacebar to fire laser against the enemies.

References:
[1] Space Invaders, Game,
http://en.wikipedia.org/wiki/Space_Invaders

This function was written by :
Héctor Corte
B.Sc. in physics 2010
M.Sc. in Complex physics systems 2012
NPL (National Physical Laboratory), London,United kingdom.
Email: leo_corte@yahoo.es