Oponki is a simple Windows Phone game that will challenge your reactions. The game's layout is uncomplicated and calls upon you to tap the left or right side of your Windows Phone screen bases on a series of instructions that will vary from level to level.
Oponki is an easy game to pick up but don' let the plain appearance fool you. It won't take long before you find yourself tapping left when you should be tapping right or see the game timer run out before you figure out which side of the screen to tap. If you're looking for a way to test out your reflexes, Oponki is a Windows Phone game worth trying.