Money wall

Game is fun as hell until you reach the infamous money wall, in which progress is impossible unless you pay. This happened to me at level 50, as it would take weeks/months of grinding just to beat this single stage. With nothing to do but repeatedly play levels that Ive already beaten, Ill probably delete this in the near future. Oh, and whats up with having a 100% chance to beat a level, only to get DESTROYED!?!?!?

Come on maaaan about Rise of Heroes