Pac Man Controller

Hi!
How can I set up a movement system like Pac Man?
I got the character move automatically when I press the directional buttons, using Tag, but I have problems to rotate the character the way it's moving. I have tried Look At tag, rotate, Keyframe. I also tried to have 4 characters, facing their own directions, left, right, up, down, and then turn on/off visibility. Nothing works.

The last thing may be the hardest part of the controller. When you move Pac Man to the right, and then you press the up button, Pac Man will automatically move up to the next possible path.

If anyone want to help me with this, or have some suggestion how I do this, please let me know. :)

Meanwhile, sweet Dreams! :)