I actually like this game but cannot respect the developers. As you advance, the game does not allow you to enjoy it. This is because every time you reach/ meet the difficulty level it allows you to win and advance to the next difficulty level immediately. This is so you are ALWAYS behind. When you... Show more are behind, you are needy. You have 2 choices ... Either spend real cash or watch countless ads. Either Way they are making money from us needing to upgrade our doctors, equipment, patience, and devices. And oh, let's not forget that when you fail a level ,you only get 10% of the coins you actually won. Making this so frustrating. For example, if you are at zero and earn 700 coins during gameplay but failed...you are offered 70 coins. But hey, the doctor needs 1800.... it will take forever especially if you have used all your boosts. This is where the ads come in. Oh my, you really don't need to spend real money with this game but you will literally spend so much time watching ads just to get what you need to catch up. Either that, or spend real cash to bypass the ads. Summary Pro... Fun game, smooth gameplay, cool graphics Con... Being held hostage by countless ads because I don't want to spend $9.99 a week to bypass them.....not a typo....A WEEK!!