I'm sorry to dredge this topic up after so long, and I have nothing significant to add.  I'm trying to play this again after some years and I'm predictably in awe of the programming effort and complexity, puzzle designs and sheer length of this level. I also just enjoy playing it (for stretches of time).
Perhaps there's people in the current community who haven't played this level yet...

Thank you helvetzia. I saw this a few days ago and it inspired me to replay Define and it occurred to me that... it's kinda hard? Haha.
I decided to make some very minor adjustments, and now here is a version that is slightly less difficult in like... six or seven spots, but more notably it's easier to see which blocks are deadly because their letters are tinted red.

https://www.mediafire.com/file/egd0wlsc8bzhdjo/KG_-_Define_-_Easy_R.knytt.bin/file

For an after-Christmas gift or sommat I don't know.

Fun.
Sergiocornaga asked me if I wanted to work on this level too but I was (and still am) terribly busy. I did kind of want to and felt it too bad that I wasn't able to be a part of this project, but it's not like you guys needed my help anyway, haha.
Cheers, at any rate.

These are the tracks I'm sure I've heard before, but can't remember where they're from.

Ambiance 7, 10, 15, 20, 32, 46, 51, 85

Thank you

Sent a personal message.

I'll just edit my save file or use the cheat code and go on. If you think you can fix it easily, good; otherwise I don't think it should be a big deal.

Ahh yeah, I looked into it and I can see what probably happened. It looks like I was a little sloppy with a couple shifts there. Usually I'm not.
It is easy to fix, but I guess I'll wait and see if you or anyone else encounters any other issues before re-uploading Define.

I'm stuck at

Spoiler: (click to show/hide)

"SR54GF-ZYUTON2XWUT ON22UTGF3GF ML2VW2ML".
There's a moving block (the one that shifts to Juni's height) that I suppose I should stop by using a dark blue block on the right; the problem is how to make the moving block align with the dark blue block, as the other blocks prevent Juni to get away from it at the correct height.

Excellent level, by the way! Puzzles like this are hard to make with Knytt Stories. At first I was really confused by the huge variety of blocks and their properties. I still can't remember what some of them do (yes, I had a look at the 'instructions', but sometimes it's quicker with trial and error).

Dang, man, you're getting close to the end! (Well. In one sense, anyway.)
But yeah that one is a bit of a doozy and maybe a tiny bit unforgivable.
The way to do it is to lure the block near the top and leave it there (this is done by jumping up next to it, then at the peak of the jump moving away--if done correctly, the block will lose "sight" of you and stay where it is), then you have to lure it downward by going around on the left side to the bottom and dash forward and back to get the block to move down but not quite down to your level.
From personal experience and from what I've seen of others who did it, it takes at least a few tries to get the timing right. Basically the important thing about the block is that it will only move when you are in any square (in the imaginary grid of Knytt Stories) to its side, otherwise it will stop moving.

Anyway, thank you. This definitely was not easy to make, but someone had to do it!

Possible Bug Report: When Juni shifted into this room (see image) she found herself swimming above the spot where she is depicted in the image.

Oh. Yeah sometimes strange things like that happen. If you restart or use ctrl R it should fix itself.

I have similar problem as Sergio, but in different screen. I am not able to find it, because my KS gets horribly slow while playing this. I like the level, but I am afraid I will not be able to finish it because of this problem. 

Oh. Wait, who's Sergio? I dunno what you're talking about here. But, yeah, it is pretty big and it would cause slowness issues on some computers.

It's really interesting, and a couple of the blocks that I've encountered so far, especially the green one that maintains your direction upon entering it, are ingenious. I think I'm up to the dragon but I don't remember that well right now. It's really long. I can imagine the shifting and room duplication necessary for some of these puzzles and the amount of work is staggering. Both from a perspective of design and a diligence, in regard to the limitations of Knytt Stories, this is a masterpiece.

Thank you, but uh, I'm honestly a little confused about what you're talking about here. The block "that maintains your direction upon entering it" makes it seem like you're indicating what I think is the vaguely purplish/dull magenta vav, but you said green so maybe not?
Also, there is no lone dragon. There are two dragons, who appear together, but maybe in the case of one of them it's not quite as obvious what it is.
At any rate though, yes, there were a substantial amount of shifts and duplicated screens. Much of the bulk of the 4744 screens is the result of that.