A mobile game where you play as a very sleep deprived student struggling to stay awake in class. Sound is an important aspect of the gameplay as players will lose vision as they fall asleep. The game is played in a first person perspective where the player can see their surroundings when they are awake, but as soon as they start falling asleep, their vision will slowly become more blurry and eventually a black screen, which is where the sound comes in. To be able to get enough sleep, the character in the game that players play as will need to have a black screen for as long as possible until the sleep meter fills up. If they are seen by the teacher, they will get kicked out of class and it will be game over. When they are sleeping (black screen) they will need to listen for sounds and if they hear the teacher's voice getting louder, they will need to wake up to avoid being caught.

Image used:

http://tx.english-ch.com/teacher/mar/sleeping-students.jpg