Using a laptop and touch pad, I found movement and control difficult while using the W key to move forward and the touch pad to change directions. This behavior was much more smooth when using the Up Arrow key and the mouse pad. Not sure what the differences are between the two inputs.
I had to exit the game and re-enter to find the key binding instructions again (forgot that needed to push "E"). This should probably be in the menu options when you hit Esc.
The down arrow would have the player turn when I almost always intended for him to walk backwards.