Learning to do 3D over the course of a jam is very impressive, regardless of the simplicity of the game. Obviously it was a maze, but I wish there was more to help navigate. The low lighting and the same walls everywhere made it really hard to path without going in circles. Maybe audio cues as you get closer or different land marks to help the player navigate would have been much appreciated. The light at the center didn't really help enough for me to be able to use it as a tool for getting around.
Recommendations aside, super cool that you started doing 3D. I think this is a great first project. I really liked the atmosphere and lighting, just wish there was more to help get through it.