@Freq: I had originally planned to make two more sections the size of the current level, each with two main pathways. But then I realized that it would be too frustrating without save points (and having to save just to get through the level seemed contrary to what I was going for with this level).
What I was alluding to in the first part is just a variation on the current scheme, but one that I think should be a lot more fun.
@Crono: Re: the editor: option-drag is your friend. The only other features the editor really really needs are grouped-object management (for scaling and rotating parent-child linked sprites together), multiple selection and simultaneous attribute editing on multiple selected objects, and numeric editing of sprite position, rotation, and size. I used to think the lack of auto backgrounding was a big deal, but after actually making a map, I find it quite tolerable; those three, OTOH, would be a dream.
Other niceties I could dream for would be an overview window with a draggable square to navigate about (so you don't have to zoom out to 25%, drag over to where you want to edit, guess at the center of the screen, go to 100%, then pan to where you really wanted to go). An alphabetized script selection menu would be really nice too (while you can type your way to your desired script, alphabetization would make life in general easier). Some way to get at sprites that are entirely covered by those above them is also needed.
But I'd better stop before I turn this into a "Suggestions for Future Versions of the Editor" thread.