Welcome to the forums. They have an emergency shifter that can be used to shift manually in case the electric shift quits working, but it's only to shift into a gear to get you home or wherever you need to go. You have to use your hand to shift and it's not meant to shift while you're moving.
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.