The creator of the amazing GB-to-SNES Super Mario Land conversion has just released version 1.1, which fixes all previous complaints!: https://archive.org/details/newsupermarioland
For anyone just discovering this game, an unknown developer re-wrote the original Game Boy’s Super Mario Land from the ground up as a Super Nintendo game, playable on original hardware. Everything about the game was re-created, including the graphics and music, which sound amazing. As appreciative as we all were of this amazing game being released, there were a few complaints: The jumping sound effect wasn’t liked by some people, the hit detection wasn’t always perfect and the controls felt a bit “slippery”. As much as I loved the game, I couldn’t get past level 3-2.
Well, I’m happy to report that this updated version fixes all issues! I played it today via my MiSTer and was able to beat the game. This is a game I think every Mario/SNES fan should try!