Ok first of all, huge congratulations, you're the first person I know of that beat the final boss!
Second of all, sadly that's a bug that I didn't catch before the deadline, where the "fakeout" projectile wall doesn't actually despawn when it should have. You're supposed to jump into the orb to trigger the alternative ending (which right now is just the normal ending with one changed line, so you didn't really miss out on much). I will be fixing that and some other bugs as soon as the voting period is over and I can update again!
Big apologies for the issue, and thank you so much for your kind words and putting so much time into my buggy and unfinished game, it really means the world to me!