It's true that I didn't post any of my work on the CS forums. I planned to release the first demo of my mod here when the debug is finished, but if you really want to see what I did, then there it is:
http://www.rpg-maker-detente.com/t534-cave-story-red-lies-v011.
Beware though, it's french and quite glitched. Also you might have to register on the forum to see the topic.
But!! I don't plan to do the same on my maps as in my mod. Because, you know, it's just a beginning. I didn't put any glitch-exploiting in Red Lies. Also, every "pixel-perfect jump" is only optional and you can finish the mod without having to do them.
Also, the map called "Le Broyeur" is REALLY, REALLY TOO FRIGGIN HARD. Don't bother trying if you don't want to lose time. You'd rather edit the game so you can try the boss, whose map is "Salle inondée", just after "Le Broyeur".
As for glitches², I plan to make sure every player can discover them easily while playing, so they can use them to achieve further maps. It's the basis of Level-design: introducing the player to a new technique before making him use it.
I think I'll do one/two "hard-but-not-really-hard" maps, then make one/two more as optional-hardcore maps hidden in the first one/two. That means I'll probably only use two or three maps.
Edit: since the link I gave you is in french, you'll probably not find the DL link easily. That's why the DL link is here:
http://www.mediafire.com/?64yspzo6rk8id5g
The first one is only for presentation.