Updated controls, some glitches — Rebellion Steam update #8041

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;