I thought about releasing the Mario Flash editor yesterday, but I'm holding it back for one last round of polish. Here's what to expect:

• Bulk map editing; copy-paste in and between zones

• Adjust warps and zone widths dynamically

• Set level entrances and warp exits off the grid or overlapping each other

• Place invisible walls and custom victory triggers

• Save author attribution and commentary with level files

• Export levels as PNG images

• Load example files from the game's original 10 levels, or 7 new ones by yours truly

I’ve had tons of fun toying with it. Here's level 4 from the original game as an image!