I like TRAINS
simple variables, basic math, advanced motion, simple conditionals, variables, advanced math, advanced messaging, functions, simple messaging, miscellaneous, advanced animation, actor properties, level design, expert physics, detect conditions, resize actor, conditional wait, input/output, advanced physics, advanced costume handling, cloning, advanced loops, direction and turning, expert math, simple events, simple motion, screen bounds, simple sound playing, text handling, string handling, stage property, simple loops, advanced control, basic physics, conditional loops, pen color,