oh that depends on what you want to build..it could be moving barriers and cannons that shoot fire, if you have in mind to make a puzzler, enemies to shoot while you swing around if you want to make it action....you could even give it a side-view, gravity, swords and giants if you wan´t to make it an attack on titan fan game. Personally i had fun messing around with the 1dg, because of the sense of speed it gave me. maybe bigger, more elaborated levels would add to that