Fixing problems on webview game app

This is my app.

https://github.com/Maz-POTAT/online_quiz_number_word

It is a webview game.

Now i need some changing and adding features.

Please download it and open your local. Play all part and record screen.

And this is Play store version.

https://play.google.com/store/apps/details?id=iskelot.zafer

You will see, play store version a bit different.

After that send me a message.

We will discuss more futures and fixing issues.

And my budget.... Max 500 dollars..