This is such a cool and philosphical/psychological concept. The overall main ‘hall’ felt quite despairing and dreary, which is probably the atmosphere you aimed for. Which is a good thing.
Those tiny little things, like the emotional state of the main character being shown in body language, make it complete.
But alas, after I transmuted into Hope, I got stuck when the cube of doubt disappeared, making me stuck in emotional limbo for a long long time…