I don't fully understand what's happening in the game, but it seems like there just wasn't enough time, right? For some reason, after getting the jump on the top floor, I received the jump again - nothing changed. Mechanically, it plays quite well; as a template for a simple 3D platformer, it's very decent.
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Indeed, time and my own very poor planning! I only had a vague notion of the story as I made it, hoping it would gel in time (it didn’t) and it’s made worse by how much temp art I left in. FWIW you successfully got to the end, that last pick up was supposed to be invincibility to then smash all the hazards and the machine powering them, which I did not actually make in. I’m glad the played well enough, I’ll be working on it post jam, hopefully into something really worth playing.