One out of two play online

This is a game where you need to choose one of two objects, two concepts, two things. In each level, you've to answer 20 questions correctly. Each wrong answer adds two more questions.
The game is suitable for children from 3 years old (adults too).

PS: This is my first application on GooglePlay. Write me about all the problems. Indicate the machine on which it happened and it's if possible - PrintScreen.