The one-page dungeon format is a tough entry point because you need to be really efficient with your writing.
The main piece of feedback I want to give this is that in dungeon exploration and similar adventures, the aim is usually to encourage player choice and player agency.
Does the player have any choice in what happens next?
And when they choose what to do, do their past actions have any meaningful effect or consequences on what happens next?
In this dungeon, it seems that all routes end up in the same room no matter what your choice is. And it seems that no matter what route to take, there's no way to alter what happens at the end, unless I've misunderstood something.