Great game! Don't think I've really met Liam before but I feel the need to apologise to him when I do.
Couple of things I would suggest are having something like a shadow or a reticule to more accurately see where the hammer will hit, as currently depth is a bit ambiguous, as well as maybe a delay before you're allowed to whack again on a miss, as currently you can just kinda spam click and flail the mouse around.