Balancing around WASD and mouse movement

So, as title say, currently the game is 5 times harder if you only play with mouse compared to WASD. It looks like you just make bosses around WASD movement.

You should remove mouse only movement if you dont plan to balance game around it. Don't try to appeal to everyone because that is just not fair to people who would start to play the game thinking that they can play fair with mouse