All you have to do is tap the corresponding buttons when prompted before the timer runs out.The overall game-play is designed in such a way that it'll try to confuse you to the maximum. Currently the game consist of 5 unique levels which will make you mad when you dig deeper ;)

I request you all to read the tutorial included in the game before playing. (After level 3,the controls are reversed, you have to press Right when it says left and left when it says Right, Top when it says bottom and vice versa)