Thanks so much for playing, and for the comment! We are currently trying to improve the controls, I agree it can be really tricky to move about the map with just your left hand doing direction and jumps. We will try to add controller support, and also change the way the mouse aiming works, so you only require a small change (joystick like) to change the direction of the aim. I will also look at slowing the hero on the wall.
Also I played your game a week ago and it was awesome :)