TMNT for DOS was one of a few games from the period that featured copy-protection via a code sheet printed on so-called "copy proof" paper. This is dark maroon paper with black ink which most black and white copiers would not be able to copy in a readable form. The code sheet which was stapled into the game manual, featured hundreds of four digit numbers in a grid which you needed to look up to get into the game.
The reason why the Turtles all wear red masks on the cover is because that's how it was in the comics.
In the movie The Wizard
, Jimmy is seen playing the Teenage Mutant Ninja Turtles
at the arcade at the Casino in Reno.
The translated Japanese title is "Ultra Turtle Ninja Legend".