Thanks for the feedback! Yeah we wanted to fix that jump lol but the map was hastily thrown together day of the deadline so there's a few things I'm unsatisfied with. Such as the fact that you can enter the boss room without the final upgrade which is what I'm guessing is happening to you. there's a final upgrade that makes taking care of enemies a breeze in the top zone.
EDIT: upon further inspection the final boss himself might be broken and unbeatable, we'll look into it lol.
Mooserider who did the coding and designed the rooms loves his games punishingly difficult, a design choice we disagree on. Eventually we're hoping to redo the map to iron out all the kinks with that at least.
Once again thanks for playing and the feedback.