Looks nice. I like it.
Only 2 issues I can find:
-Candle light could use more frames of animation
-I have a problem with the drag and drop interface with the key to the door. That would have potential problems like if the key's hitbox does not collide with the door then the player would think he's doing something wrong.
You really need to create a system where if you click on the key once the key is selected so that the next object you click in the environment would "interact" with the key.