Reasons for 2 stars only it would be 4+ if: 1) U get heal As bonus in spin after boss battle even if you already have full health. Also Heal prompts when full hp...... 2) The ads that are being displayed on Android OS sometimes they do not have close option but only redirect button, And those ads do not even close up by pressing "back" button and even after Redirect they do not have Close button. So in short we Get ads, U get money, but we dont get rewards cox we have to close app.