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 =).