Very fun gameplay. Starts out progressing quickly; you hit a speedbump around world 5 where it feels like you cannot beat a level without watching the free food ad. But then that subsides on its own.Suddenly I was beating every level using the good old-fashioned method of spamming tanks and archers. The other units almost might as well not exist, which is always a design challenge in these games. But at least it's beatable and satisfying. Tanks unable to walk past archers is annoying, tho.
Developer reply
Hi and thanks for your feedback! We are trying to find a good balance on difficulty. Some players find the game too easy while others too difficult. We did recently add more coin rewards throughout the game. There are also many ways how to get them even without IAPs. But if you do make a purchase: Daily Coin Tripler and Royal Path have great value.