The game makes it harder to level up. Game became money greedy, looks like you need to buy to level up. Upgrading gets harder and higher amount to pay for every offer if you bought their store offer. Game slowly getting sucks and they dont give out automatically compensation on their developers issue. They wont acknowledge the fault on there end. Update your system for betterment and accept your lapses on the game; give out compensation, maybe a lot of player will choose to stay.