I don't remember, but I got the glasses and the manual on my 4th or 5th run, and it took quite a few more attempts to finally fly. Especially with the slider, it took me a few tries to understand how it works.
I'm not sure how many runs is ideal, but finding the manual is what kept me going, otherwise I probably would've given up after the 5th run :D. So maybe as long as there's a sense of progression, it can keep players engaged. and maybe a quick retry system would help too :)