Just play
Game, Simulator, Animation, Physics Engine
expert physics, simple events, detect conditions, simple loops, variables, conditional loops, advanced costume handling, program control, advanced math, screen bounds, delays, basic math, simple variables, simple conditionals, visibility, string handling, miscellaneous, simple messaging, cloning, input/output, direction and turning, text handling, advanced motion, simple costume handling, actor properties, resize actor, advanced messaging, advanced events, simple sound playing, conditional wait, layers, timer, basic physics,