1. The falling platforms are supposed to respawn after falling.
2. I reached the top and nothing happens.
3. "u"
4. No music.

Looks like you reached the top.
:1
Hurrah?

Again seemed experimental. Edge detection was lazily done as large rectangles, double jumping only works if you started a first jump; the midair jump won't work. The level design is shoddy and if one of the falling platforms drops and you fall with it to a lower level it won't respawn making beating it then impossible.

The lack of polish is astounding for a publication. It shows little to no improvement from your last experimental platformer and has nothing new as far as I can tell.

Also, occasionally edge detection will glitch causing invisible barriers between two adjacent platforms.

It doesn't feel like I was rewarded enough for reaching the top. Also, do we just jump to our deaths?

For the next version, you could add some "things that are standard in platformer games" like enemies, more dificulty (but no so hard), and an ending. An intro should be on the next version too.
One more thing, add music.