No, this isn't the longest platformer on scratch - yet. There are currently 133 levels which already makes this among the longest scratch platformers in terms of amount of levels. As far as I know the current record holder is The Official Longest Platformer 2 by @ducky_inc with 200 levels.
-Cheat Codes- (More in-game) skip - Skip level. skip100 - Skip to level 100.