This was an amazing little puzzle game! It looked like it was super fun to work on! I really would love to know if you personally worked on making those models or if they're from a asset pack? Cause they amazing! I loved the style of everything!
Not only that but the level design was amazing! I'm incline to assume that this is not actually your first game project because, while things were very bare bones for the time being, what was there was exceptionally placed.
You were already aware of the issues with no menus and being able to fly which do need attention, but I also noticed that the lighting, when going into dark areas of the first puzzle, would go pitch black and take a second to get back to normal lighting levels (I know Unreal kind of does this by default, I think, just needs some adjustments). SPOILER:: It was quite hard to find the pressure plate in the first area because of the lighting, or maybe you could make it stand out better with the current lighting
I think the experience would be greatly enhanced with some ambient music/sounds. They sfx already used were really high quality and were a good choice!!
Hope to see more from you!!