Nice job! I really liked the ending. I don't wanna spoil it, but it was great. I would suggest, however, making it a little easier to find the ending
I liked the level designs. It almost felt like a maze, running around looking for keys.
I feel like the player need some animation. Something to give them some life, less just like an image.
Other than being silent and a little short, it was fun to play! Well done!