For now, you're better off just playing around with it.
Once the editor is of beta quality, the level format will be locked in and from there it will be safe to make elaborate levels. if you make any levels now, just be aware they may stop working as the editor advances. I am actively working on it, and things changes a lot. It has not even reached alpha quality yet.
regular levels, overworld, tile editing, etc saving multiple levels to one save file the more elaborate terrain (hills, boxes, air ships, etc) full fledged room styles (plains, sky, underwater, etc) keyboard shortcuts (press ? to see the list) drag and drop, panning, undo/redo, fill, etc a built in emulator that takes you right to your level for fast feedback multi room support, with doors to move between them (pipes not yet implemented) 105 entities (ie enemies, terrain, etc) to work with It's really easy to use, just draw your level, pretty similar to mario maker in that regard. It creates e-reader levels that are playable in an emulator or on real hardware with an everdrive. Still early days, and a lot more work to do, but it's progressing nicely. Smaghetti is a Super Mario Advance 4 level editor, available here: We've been chatting about this in the SMA4 hacking thread, but I thought it made sense to start a fresh thread.
