Super Mario Bros.: Mario's Cloudy Nightmare

Oh noes! While saving Princess Toadstool from Bowser's evil clutches, Mario and Luigi were caught off-guard by the king of the koopas, who, using one of the many magical staves in his possession, turned the two plumbers into nothing more but a part of the sleeping Princess's dream. They must now escape from the dream world of Cloudland before the princess wakes up, or they will vanish forever. To do so, they will have to go through 13 exciting new levels with pretty & soft palettes, 13 dangerous new levels spread across 5 Rounds (which replace Worlds, as a reference to Sonic CD), with plenty of Koopas, Goombas and Hammer Brothers to get in their way...Can they do it?

Difficulty: Medium-Hard (About as tough as Worlds 6 and 7 of SMB2J/The Lost Levels, with some tricky jumps though plenty can be bypassed)

Length: 13 levels, 30-40 minutes depending on if you beat them easily or not.

Special Features: A hidden Invincibility Koopa Shell is hidden in each of the 4 Rounds. (Though not Round 4) Find them!!

Database match: Super Mario Bros. (World)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: EA343F4E445A9050D4B4FBAC2C77D0693B1D0922
File CRC32: 3337EC46
ROM SHA-1: FACEE9C577A5262DBE33AC4930BB0B58C8C037F7
ROM CRC32: D445F698