I love this game, playing it on a Anbernic rg40xxv through portmaster, but that final boss is just insanely difficult compared to the rest of the game, not even because of his attack patterns but because the hitboxes on the little bees he sends out are horribly inconsistent and the way the bees spawn out of the ground is inconsistent too, which ends up in you getting hit half the time. Overall amazing game but the final boss is horrible design for how inconsistent the hitboxes are.
edit: Also, half the time the ammo/health that spawns from the bees you stomp ends up flying off the screen/out of reach.