Add some feature to a colouring book game & change the place of the interstitial ads(using android studio)

Requirement: ( Read Carefully ) 1- Add brush, eraser, back & forward features on the game ( I need the brush to be colored the page when the user use her finger) 2- change the place of the interstitial ads ( I will show you where…) 3- Add the GDPR to the code source Note: The game may can be modified or added any task after testing the game!