Cordova App Fix

Hello there I have a webpage-app made with Cordova. This is a math and word game. I want to improve some features and fix some problems in this game. [login to view URL] Please download and try the game first. The game is an online game. There are single, battle and tournament sections. There is also a wheel of luck. Problems; 1-We have a problem with advertising. Namely, there is no problem with interstitials. However, in rewarded ads, players cannot receive the reward even if they watch the ad. In addition, a notification should come or a page should be shown that you have received the award. 2- There are some text fields in the menu that come from the database. Confidentiality agreement, how to play and rules sections. No problem how to play. Others, however, seem to have white writing on a white background. Because the scroll works but the articles are not visible. 3- We had a similar problem with different mobile phones. They did not see the user name and password when signing up on Xiaomi phones. The same thing happened on the iphone web. However, they could write. So they were signing up, but they couldn't see what they were typing. 4- After each game, we have a page showing the solution. Since the word game runs entirely on the database, we show the solution through the database. No problem. But the math question consists of random numbers. Therefore, calculation is required for the solution. But especially in multiplayer episodes, this calculation creates problems. I want the math question to come from the database again. 5- More than 4 people playing in the tournament section (multiplayer) caused a problem. This problem can be solved with item 4. But if it's not resolved, we'll have to look into the cause. 6- I want some changes in the tournament section. These are minor design changes. The designs are ready. However, some minor changes are required in the database. 7- Everyone has 3 lives in the game. This life is regained in 2 ways. 1- You gain a life once every 30 minutes. But in this way, you can have a maximum of 3 lives. The other method is with the wheel of luck. The problem here is that if you have 3 health, your health will not increase even if you gain 3 more health with the luck wheel. You are watching an ad for nothing. Yes, if you have 3 lives a new life shouldn't be added every 30 minutes. However, if you win on the wheel of luck, it should be added to your account. 8- I want notification under certain conditions. For example, people who do not play the game for a long time or people who are bored. I would like a separate offer for each of these items. Because some items are very important while other items are unimportant. I may not be able to do some items.