Fix my unity game

I have a unity racer game launched in the app store but I would like to update some minor things. They should not take long. A lot of value and text changes and a png splash screen.
- Update the price for rewards (video add),
- Update the cost of the 3 bikes to unlock
- Update the cost of the 2 levels to unlock
- Update 2 Gamemodes with timing
- Update 2 textures in the game
- Add Bikestats in the bike menu (text stats already exist weight (mass), handling (steering) and power (power)
- Add Splash screen (png) and start button screen (scene with button to menu)
- Check if adds are configured correctly and working
- Provide new release files for android and iphone