I have made some improvements after some great feedback. I have tried to make it easier for a new player.
Changes:
* The game test how fast your computer is tha first time you start up the game and sets the graphics accordingly.
* 6 out of 8 difficulty levels are locked from start and the first ones will send you directly to the level.
* The levels generated are now restricted when you start up the game and get bigger as you complete more levels.
* The menu is a bit more user friendly.