How do we place the ground down? I went to play my game and i just kept falling.
That depends on what you mean by ‘ground’ as such. If you just want to place down a plane, go to GameObject > Create Other > Plane in the Editor Toolbar. Alternatively, if you want to place down a Terrain, go to Terrain > Create Terrain. You can then position, rotate or scale your newly created plane or terrain in the Scene View (actually, I don’t think you can scale and rotate a terrain in Scene View, I believe this is done via script).
Hope this helps! Klep