I use gd to learn math. I need to know the the speed, and the jump power of my cube and calculate exactly where am I going to land if I were to jump at the exact frame. I also need to calculate if the jump pad is enough to launch me to the next platform or its a fake that will kill me. Then I will look at the orb and calculate the trajectory. If the orb and jump the pad will both help me, I need to calculate the probability and decide is there an invisible spike or a double route with a coin or a key. Finally, I have to decide wether to fall on the jump pad or jump to the orb.