I can see a good potential in this little game ^^ I really liked the music, and the graphics are cute!
On the side of things that could be improved, I really mourned the lack of saving points or lives, haha! Also I don't know if it's just me, but I noticed I couldn't put on the shield if I was moving? I had to stop moving for my mouse clic to do something, so it kinda broke the rythm of the game for me. Lastly, I have an azerty keyboard so the key bindings (A & D, mostly) were a bit awkward for me.
Other than that I think it was nice !