Whenever he used the psychic powers a voiceover starts saying how pleased the tadpole is. I hypothesize that could speed up the process to become a mindflayer. Maybe that will give you more powers or we start to see some changes in your body ( Kotor dark-side-mutations and empowerment comes to mind).
But at some point you could lose yourself in the transformation, and that sounds like a game over (or a very strange change of character middle-game)
