I am now using a level editor for Super Mario World called Super Mario World: Master Quest. It is Super Mario World edited to be super hard and only masters of the game will be able to beat it. The map and story line are exactly the same and the exits and music and background are the same. All that changes are the levels that means every level will be made super hard(even star world). I have not even started to make this game yet but just wait and it will be done soon. I will send a demo of the first world which you will need ZSnes emulator. If you need help setting it up just ask me. If you are truly very good at the game you will know the techniques which are used. You will need to use ALL of the hardest techniques like the P-Switch Jump and Koopa Shell Jump. Also the wall jump and spin jump will be required. No serious glitches like walk through walls will be needed for this but a good brain is required for the castles.
Also the level names remain unchanged except for Yellow Switch Palace which is changed to Training Ground where you can train you skill.
That is all for now I will post updates when I can. Please comment, report bugs and anything which could be improved upon.