Mario's Final World is a Super Mario World hack project I've been working on for quite some time now. It combines my pitiful level design skills and vast technical knowledge to create a hack which is hopefully playable.
There have been two dead hack threads and one demo, released during the summer 2017 C3. A year later, the hack has become a lot more polished and a new world has been completed (i literally stayed up till 4 AM last night to finish the world 2 boss rip).
I hope you enjoy this demo. Please leave any feedback you have here, I'm open to suggestions. The demo is probably about an hour long. It's quite hard, keeping in mind my abysmal playing skills.
Known issues include wrong priority on the handrail of a Donut Bridge (it's in Sky-High Forest and you probably won't ever find it) and severe lag in some levels, most notably the second part of Oasis Castle. VWF dialogues sometimes create garbage when opening, but that doesn't affect anything and is only visible for a fraction of a second.
If you're not sure whether to play this, you can have some screenshots.