Contribute correction: MSX Invaders! (unreleased)

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