Tip: Switch palace switches normally disappear if you replay the level. However, if you insert them as direct Map16 and use the hex-edit at $00EEB2 in the ROM map, you can replay the level without a problem.
Good hack with a bad curse: the disgusting palettes and occasional cutoff plaguing most of the levels. There's nothing really NSMB-ish about this hack if that's what you're expecting, and it's quite the opposite of Lost Levels' legacy, being a rather easy hack while that game is notoriously hard for the Mario universe's track record of difficulty.
That said, if your eyes feel fine and you can put the name aside, I strongly recommend trying this one if you're looking for an easy hack that's got fun, classic-style levels. The hidden bonus rooms are very "Mario" in flavor, and some designs, such as the staircases leading to the goal post, the block formations, Toad House with an item, and the secret exit in the cave level, are all throwbacks. There are no "1-1 remakes" in this old-school-style hack though. The only real ASM hack I see in here is the breakable brick, which adds to that retro feeling.
The only thing that really breaks away from that is the SMW mushroom platform that moves up and down like an easier version of the scale platform from SMB1/2 - I liked the way you had to go forward on one to raise one very high then backtrack to push the other one up and hurry across so you can make your jump, and while this sounds like word diarrhea, you'll know the area when you get to it. Little things like that are pleasing.
The overworld design isn't too bad but I'm not a fan of the paths and I'm really not a fan of the fine line split where grass becomes desert.