I was impressed by the graphics and the overall look of the game. The intro scene looked really professional. I liked the smooth door animations.
I would flip the controls by 45 degrees. Would feel more intuitive if you go in the direction you pressed from the cameras perspective. Currently you have to press "left + down" to go down instead of just pressing "down". I feel like this simple fix would make the game a lot more enjoyable.
I also got a bug where the camera got stuck and I had to try to beat the level without seeing it properly: 
I appreciate having some music and the mouse squeaks are a nice touch as well!