Curious way to describe it but I'm pretty sure it's using Intel HD graphics with old drivers. That usually makes everything a texture garbled mess, can't see anything but HUD / Menus.
Update your Intel drivers.
If you have an nVidia card, it isn't using it.
More info on all that here: http://answers.ea.com/t5/PvZ-Garden-Warfare-PC/READ-FIRST-Before-making-a-new-topic/m-p/3032830#U3032830
