This hack alters all of the original game's levels and features some gameplay alterations for the four playable characters. The enemies and bosses have also been altered to be tougher. The difficulty is a bit harder than the original SMB2 but nothing crazy. It's a little janky and weird, but not too bad hopefully.
Features
-20 new levels
-updated gameplay
-faster, stronger enemies
-crazy, silly boss fights!
-and more?!??
Database match: Super Mario Bros. 2 (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 7DF0F595B074F587C6A1D8F47E031F045D540DAE
File CRC32: 7D3F6F3D
ROM SHA-1: 43AC7C7AAF1846EAD7B544302BB9131E4964FD32
ROM CRC32: 57AC67AF