I was able to just hold the jump button and never really had to play, I just zoomed up off the screen.
It looks like you used the render texture downscale method to pixelize, which can work, but it struggles to deal with scrolling objects tightly packed, so you end up with a lot of flickery boxes, and it also results in a lot of instances of the letter "i" just not being visible at all in the text at the beginning.