This is an addictive game where you tap DNA bubbles to match patterns that you see in the top left corner of the screen. The bigger iPad screen can hold more DNA molecules so you get a total of 20 levels on the HD version of Doctor DNA! That's double the number of levels of the Pro version!As the game progresses, the molecules get smaller, move faster, the patterns get longer and the hypnotic background spins faster too!The game features Easy, Medium (the default), and Hard levels. The hard level is for power gamers only!There are bonus DNA molecules in the game to help you out and a timer to make sure you don't take too long!The game includes six mini-games! You get to play a different mini-game after every three levels.