I love the aesthetic, but I wasn't able to figure out if there was anything for me to do other than walk around the map. Really nice start, especially since you are new to Unity. Congrats on getting something out and submitted!
Edit: Thanks for the help! I got through the door and started the maze. I think the concept is great! And the artwork is still really well done. It would be helpful if I didn't have to hold down the k key to complete the maze and if there was at least some indicator for where my player is. Thanks for the submission!