Hmm... This is the best hack I've ever played, by a wide margin too. I have been playing this on a SNES classic, but have had a few minor issues. The border around the overworld map, which has icons that change color depending on the current world, seems to occasionally disappear and become entirely black. Also, when I first attempted a 2 player game, my friend lost all five of her starting lives, and should've gotten a game over screen and had the life share window pop up, but instead automatically continued with 99 lives... I'm not sure whether or not those issues are unique to the classic, but, otherwise, I've made it to world 4 so far and absolutely love the game, an easy 5/5.