Thanks for the feedback. I knew about the shortcomings. Sadly due to problems with unity and RL errands, I could not place as much time as I wanted. I had plans for 2 - 3 small levels and one boss and better gameplay. I am glad you like some parts and the honest feedback. The game is 3D there are no layers in a 2D space.
Haha alright if you say so ;) I would definitely describe this game as 2D because the player moves through a two dimensional space and the third dimension is purely cosmetical, making a classification of "3D" quite misleading but yes, you are technically correct.