Tip: Take advantage of easy to install Patches in your hack. The No More Sprite Tile Limits or SA-1 patches should be considered if you're encountering glitches where Mario and/or sprites are turning invisible.
This hack isn't very good - two of the levels feel structually very similar, and one has a midway point that will kill you if you don't start climbing immediately. Another level has a midway point that's seconds away from the goal post. The castle is an anticlimax to this short hack, with almost no content before the boss, and much easier than the levels just before it. There's an overabundance of coins, and some areas where clusters of enemies will just swarm or chuck things at you. By no means a pinnacle of creativity and delicate craftsmanship. Total length is about 8 minutes.