There’s not much I can say about this game which hasn’t already been said by everyone else.
However, I genuinely didn’t realize that there was more to the room below the conveyor belt. I played through the entire game assuming that the conveyor belt was the natural lower border of the playable area, and only found out that there was more when looking at the comments - and then played through the game again with this newfound knowledge. Maybe starting the player on the conveyor belts (to, y’know, convey the fact that they’re walkable) might be worth considering.
Still, very impressive work, as usual. And that ending broke me.