@Trai_Leammookda looks like you are in Python now, but started out playing in JavaScript. Like @Deadpool198 said those WD2 levels are only required if you had started out in Python. Also, these are levels that you have already completed in other worlds/maps. We just repeat them here in JavaScript for those that are on the Python path to begin with. These levels are a way to review JavaScript basics before continuing on in WD2.