I extended the engine a little bit, now it is able to do 2D graphics. Alpha blending, color key based blitting, font drawing and a lot more is possible. Mixing 2D with 3D graphics is no problem either, hence 2D can be used for example for interface drawing in 3D games. All this will be included in the next release (0.3), and I am going to write a tutorial on how to do this.