A few years back I was working on a Tool Assisted Speedrun of this game. I quit that project because I wasn't satisfied with the result. I have now gone back to the project and will focus on it from now on. I have finished the first world and is haflway through the second. 
The first world can be seen here: 
I forgot to use the secret warp at the last level however, which I have remade and added into my current progress. Enjoy =).
			
		


 
 

 , such as SMB3 and Bubble Bobble. So this isn't really new territory afterall.
, such as SMB3 and Bubble Bobble. So this isn't really new territory afterall.