The game could really need gamepad support.
Also, I don't know whether this is intended and I just didn't get what I had to do. But I am pretty sure I encountered the boss from the last screen and didn't have a weapon to fight him.
You mention left click and right click for hook and action, but nothing happens when I press those. So, I just assume I would have had to pick up some kind of weapon or anything before finding that boss.
It looks promising and the visuals are consistent in style.