This is version 4 of my 1s1s platforming engine series. It will be used in my upcoming game, Square Quest. It features improved "lava" sensing, "trampoline" sensing, and "ice" sensing. This engine DOES NOT support scrolling (but it can be changed pretty easily into a scroller), and it DOES NOT work well in the flash player (play in the java player or downloaded in presentation mode for the best results). You can use this engine too, but remember to give credit. Possible updates: Wall jumping, scrolling (may or may not be 1s1s).