I like platformers, and I like the fact we can make a short jump in this one!
The ambiance was good, and the monsters looks cute! :D
A lot of times I was just jumping to avoid monsters that weren't not a great threat, so the sword and shield were really usefull only for the bosses (The second one was shooting on the right at some occasion xD). I liked playing tennis with projectiles, even if it took me time to get the good timing.
I could have go further into the game but it was laggy when there was the four plateforms moving from left to right. It became unplayable and the jump to do was hard.
Also, I had the same idea during my brainstorm of a hero becoming less and less powerfull, so it is interesting to see this kind of difficulty along the game.
Great job. :)