For the NES version, Yoshizawa decided to keep the same title but changed everything else; it became a platformer that bore more similarities to "Metroid" than "Double Dragon".
Yoshizawa decided to keep the same title. This was for the NES version. Yoshizawa changed everything else. This was for the NES version. It became a platformer. This platformer bore more similarities. This was to "Metroid" than "Double Dragon".