I was swinging so fast I lost my cursor a few times. It's very satisfying to get overpowered so fast. After a while though the hit sound becomes a bit jarring. Other than that you have made a really good game.
That's right! It is the reason I put a line from the player to the cursor and locked it into the window when the left click is pressed (feature that does not work on browser). Could not come out with a better idea (tried a bit without luck). Thanks for playing!