Contribute correction: MSX Invaders! (unreleased)

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