Bravo. Non-euclidean 3D (with a very immersive initial section) in less than 3 hours? Genuinely great work. Sure, it does feel a little barebones, but the technical achievement in itself more than compensates for that.
I reused a portal system, there isn't much technical done in the 3 hours (most of the time was spent in Trenchbroom and Godot setting up the level)