Ok, so this is about the same level that I asked about 2 days ago; I finally managed to find the solution. I just so happened to search the name of the level on Youtube and low and behold there it was: a video from a Japanese player from 8 years ago beating this exact same level.

At first I wasn't able to replicate the glitch but then I tried holding right and it worked!

Honestly this post is more about sharing my satisfaction at beating this level than anything.

Just drop your level/account ID in comments, and I’ll be pleased to play it! I can also give you my personal feedback if you want.
And don’t hesitate to give me feedback on my level too if you want!