This was a good time.
I enjoyed the gravity switching, It made trying to hunt down a "1" button on level 4 more enjoyable (took me longer than I'd like to admit to figure that out). The portals were cool, really creative, so were the spelling cubes. I took on the speedrun timer a bit. I'd enjoy seeing more done with the quantum objects. I almost wish the player was slightly faster. Also I got a kick out of the easter egg on level 5, spooked me at first, then again when I got closer and noticed it blink. Also I'd love it if the speedrun timer reset if you reset the first level, rather than having to exit to menu and restart a new run.
The visuals remind me a bit of antichamber in a way. I enjoyed seeing the text on surfaces, I initially thought "I am shy" was in relation to the text, took a second to realize it was the walkway. JPEG mode was a good laugh, I was not expecting that, thought it would turn the moving textures still and remove reflections.
In all, very good.