Thanks for your comment Cathulhu! I appreciate the feedback. Have you tried Double Jump mode? It's another mode of play you can turn on by holding Select [S] and pressing [Up]. It gives you an extra jump mid air after each regular jump and walljump. Might be worth a shot?
Was it Lumpy's stream you watched? I'm so glad he managed to get through it! The music is amazing right! Larner did a really good job.