Was progressively impressed by the puzzle design and mechanics, and how something like the x-ray "barrier passthrough" played into advancing through (or out of) the environment. Charming music added to the "thinking" atmosphere and this beautifully strange world you guys created (and I kept the music playing on my wireless headset on a bathroom break, then came out and started wandering aimlessly around my place like I was in one of your mazes).
The puzzles in particular: challenging, but also doable. Just required patience and understanding what each thing did (which, I intentionally touched everything at the beginning, including the enemies and deathzones, to make that clear for myself).
Love the integration of the HelpBot and the occasional narrative element that further cements this as a world as opposed to a series of puzzles. Just a tiny thing about narrative UX to make it flow better: if the player has selected a dialogue option, you can go straight to the response (so the player doesn't have to restate the dialogue they just selected), but did notice this was done in the last HelpBot interaction.
It may not be remarked enough, but the AI / pathfinding of the enemy nodes I thought were organic and were the stars of the show.
Creative integration of the credits at the end. What a wonderful job you guys did. :)