Added a progress graphic in game screen to determine distance to boss.

Added achievements section with few achieves to unlock, for testing purposes.

Added auto save game data at level completed, with status screen to see progress on main menu.

Added joystick support, test it, if don't work use the keyboard. Left joystick analog axis to move, and joystick button 1 and 2 to shoot and bomb.

Added button to skip initial credits and acknowledgement.

This update increases initial load time, but works properly.