I must say that engine is Damzien's. But i improved it. If sonic jumps onto or off the edge, engine won't think that it is a slope and sonic will jump straight up and when he lands, he won't run from edge. I also included REAL roll and spindash. To do powerful spindash you should rapidly press fire 1. Try to press ctrl while standing or running. You can make through this combo, run attack or roll attack (if you are rolling). Try to kill those rabbits using comdo. Tt's cool!