But can put new graphics? or new enemies, but can not enlarge the map? if not possible, don't like the project.
If you learn Nitrofs. I do not know programming.
I love this game

could hack the original version, but, i don't like edit on PC, after, I play in NesDS.
You can add mushrooms, limited lives and flowers? that are within the block ? or backgrounds. Is not mandatory.