This game is more difficult to win if compared to the Kingdom Wars game. But if all units are used according to their energy level from less game it becomes easy. The game developer must give 1 jewel for 1 minute offline, as many games offer off -line coins. Sell ​​jewels and buy coins. If each unit is updated to the level 10 game, it becomes easy. The game developer must increase the energy level to 130 instead of 100 maximums. The game developer must give 9 squares for the selection of the unit instead of 6. Then the game will be good. Great game. But grinding to level up can be tedious. Maybe add the ability to see the gold ad and eliminate forced ads Very, very, very, very bad because. There are many ads. In the game. We can\'t continually play very bad game and it\'s worse, don\'t download it Yes, I recommend this game if you are a tower defense person. Great animation work too! I just started playing, but I like what I see. Castle Defense is a great genre for the mobile phone.