Updated controls, some glitches

Updated:

• If you are not playing with gamepad, controls on Main Menu will be show from keyboard (and alert to play with gamepad)
• Changed 'R' to 'E' to Aim with keyboard.
• When barrel or crate are broken, now I added a broken animation.
• When you kill the boss, you get the key to open the final door.
• Fix some chunks generation visual issues;