This game is grindfest.The badge of the day is a pain to get,it took me 2 hoursto get to lv 15.Also,the game somewhat lacks vertical momentum,It's impossible to progress without meteor crushing and hell raising.
I dont know about others,but I didn't have big problems with the game(With the exception of the static bix instead of kongpanions).I obtained all the badges without those,so it doesnt matter.It's a great game but with a lot of bugs.