Thanks!!! We have an internal argument about what boss is the hardest. Some people believe the dog is the hardest and other people say that the telegraph boss is even harder. It probably depends on your playing style, the dog has way less health but the erratic movement makes it unpredictable, on the other side the telegraph boss tanks a lot and makes you avoid attacks until you see an opening to make damage.
About the bug you mention, we noticed it during development but we kept it so the player has to spin the sword in a controlled way. Like how you would swing a real sword.
Thanks for the feedback and for playing the game!!! :)