Build Your Own Clock.
simple events, platformer automations, platformer basics, simple messaging, functions, advanced physics, actor properties, simple loops, basic math, advanced costume handling, variables, simple conditionals, miscellaneous, graphic effects, platformer controls, expert physics, advanced messaging, detect conditions, delays, topdown basics, advanced events, simple variables, layers, topdown automations, advanced animation, touching actor, advanced math, text handling, advanced motion, direction and turning, conditional wait, input/output, topdown controls, screen bounds, simple motion, level design,