Although extremely simple in its mechanics, and not very original in its graphics, this game amazed me. It's super fun! I think that this might be a great starting point for a rage game. Every time i died from an anvil i felt stupid, because even if i could perfectly saw it coming i still somehow managed to die from it, and this motivated me to keep playing.
Aside from the criticism that other people already mentioned, i would suggest to move the camera higher above the player, to allow you to see the anvils falling better.