I dont run this game but i was messing around found out a glitch than can skip any level. To do it, you go into level one and go right to the end but dont go in the water, then pause and go to the main menu. Then go to whichever level you want, open it and right after, as its loading press the menu button (+) and you will start the level right at the end of it.

The downside is its single uses, meaning you have to go to the end of level 1 every time you want to skip one.

Hope this was helpful !

You don't really need to do this glitch on level 1 specifically, you'll be placed in the same spot as where you were in other stages, sometimes you get stuck inside walls depending on the level. It is not useful for a speedrun as it's too slow.