Contribute correction: MSX Invaders! (unreleased)

  ______   __   __   _____      _____   
 /_   _//  \ \\/ // |  __ \\   |  ___|| 
   | ||     \ ` //  | |  \ ||  | ||__   
  _| ||      | ||   | |__/ ||  | ||__   
 /__//       |_||   |_____//   |_____|| 
 `--`        `-`'    -----`    `-----`