So I played through the latest version. I didn't end up outside of the world, and I got a second dialogue scene instead of the bugged boss battle I'd got last time, which I assume is intended. There were still some issues with the first dialogue scene and the tilemap still pops in and out at the edges, though, and collision seemed to be a little more finicky this time.
The ending was kind of a disappointment though I understand why you chose to end it there given the scope of the game and the length of the jam. The ending dialogue only had voice acting up to about halfway for me- is this a bug, or is that all there is?