@Tutu: If you want to design 2D-Games only, then I suggest you look for a 2D engine instead. 3DGS CAN do that of course. But there will be a lot "overhead" for you to work with, since 3DGS is designed to work well with 3D games as the name implies. You could use GameMaker instead, quite a nice 2D engine from what I've heard.