Hello, the black box graphical problem is due to the graphics card issue and whether it has OpenGL - (I'm not 100% sure but it seems like that is most likely the case for the issue).
It's been posted before that if you're running on an operating system of Windows 7 and earlier versions they will have performance issues that I'm unable to fix due to the program's limitations.
Unfortunately, there are no settings to change the key bindings to WASD. As the RPG maker program's default movement keys are only set to using arrow keys.
Another alternative to playing with mouse/keyboard is a controller if you haven't tried yet.