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simple variables, basic math, simple conditionals, actor properties, advanced physics, advanced motion, visibility, simple events, resize actor, miscellaneous, expert physics, simple sound playing, functions, cloning, advanced math, simple motion, platformer automations, platformer basics, advanced messaging, advanced costume handling, direction and turning, simple messaging, conditional loops, touching actor, delays, input/output, simple loops, layers, detect conditions, advanced animation, screen bounds,