Oh wow, the unreachable area at the top is where you're supposed to get the ability to break those blocks, but it seems like I made a mistake and made it inaccessible when fixing ANOTHER way you could get stuck. Uploaded a new patch that fixes the issue (+ the crash).
And yeah, when I make level design one of my assumptions is that the player isn't aware how to spam downwards shots to fly (it should never be REQUIRED to progress) and with regular MP consumption there's also a pretty strict limit to how far they can get before falling down again. Usually if it's IMPORTANT that you can't go somewhere, there'll be arrow blocks to prevent you (or a shortcut block / groundpound block that can only be broken from the other side) but there's probably some unintended shortcuts I left in by accident, like using infinite shots to fly up the left side of Tower of Crocodile and skip the entire cave section + Treehome + Tower bit of Blast From The Past for instance.
(I want to keep the genders of Terse and the protagonist ambiguous so people can project themselves on them so there's no official answer, the dating question is also the only one where there's no "wrong answer" that will piss Terse off and prevent becoming friendly)