New features to this version of the game include voices for characters, some newly-added gigantic enemies, a new boss, big vegetables to throw at enemies, score system, and assorted other little additions here and there.
The game is a reworking of the Super Mario All-Stars port of Super Mario Bros. 2.
To date, this is the third American port of Super Mario Bros. 2, although it resembles the All Stars version more than the original NES version.