This is my first hack. This is just the demo, though. But the full thing will never be finished. I eventually lost interest in this project like I usually do. :\
The story is that Iggy Koopa returned to Yoshi's Island and Mario has to stop him. Not very original, but it's just a short hack so you can't expect too much. The idea was to recreate the entire first world of SMW and I think I did okay. Not great though.