The UI and interface design has some really solid polish - that and the sounds / audio mix really make this one pop. The narrator/announcer gives the same kind of vibe as Portal, and I can see this being an interesting introduction to a puzzle game of some kind. The UI interactions felt clean, though a few buttons on the main menu (such as the "About" and "Controls", which only appear after Settings is entered/exited so I assume that's a bug?) don't work. The final "Main Menu" button at the end also fails to react.
I wish this had a character model of it's own instead of using the default one, and it's the only visual thing that I disliked. The rest is really well put together.
The entire thing feels really polished, with some really solid colour grading and lighting choices - I only wish it was longer and had more puzzles!