You're not the only person who had trouble moving around walls. The problem is that when our algorithm can't find the destination, it picks the cell that sits closest "As the Ghost Flies," instead of choosing the end cell that sits closest.
I think this is the first time I've heard about keyboard controls. I agree with you that the keyboard is inferior to the mouse, and I'm afraid it will likely stay that way. The realCursor isn't held captive, so it can move the laser pointer to its exact destination as soon as the laser pointer animation finishes.