With appearance of TTT2Info tool, I decided to post all the skips in a single guide page, removing others.

So, before running the game, make sure you use TTT2Info and in-game korean language.

Gravity cancel is used for some of the skips here, so check the shift releasing page to understand, but in short: hold up+down and spam shift in air.

Teleports will also be shown here. A bit of info on them: One of the setups for teleport is you have to stand on the edge on the block and have x.47-50 align for teleporting to the right and x.51-55 align for the left. Also your v-align has to be not x.21-49 (if it is then try 8f). Btw if you wonder how it works then this picture might help https://imgur.com/a/YCFdO6D .

Also there is a way to make ufo (or helicopter) go up or down insanely fast. To do that you hold up and down at the same time while on the ufo, which makes it build up speed without moving, then release the down key to go up or other way around. However there's other ufo in the way with one of the skips so you also have to time when to jump of during that. And the other skip - something weird happens with kid when you touch a ceiling while on ufo: the kid gets stuck but you still have control of ufo not to mention that you activate any triggers ufo passes by while you stuck, and when you go lower or ceiling ends, the kid teleports back on ufo. Apparently the hole near one of the saves is huge enough for the kid on ufo to fit in.

More guides in text form can be found in the strats spreadsheet.

And now the skips: