With the rapid development of smartphones, Android system by its unique openness, rich hardware selection, convenient application development, is accepted by more and more people. The mobile game based on Android, is gradually popular in the crowd. The game in the research with a beautiful picture and a wide variety of resources has the strong playability and a strong practical value. The developers create an 2D computer educational game that can provide certain information about different kinds of waste, shows the awareness on how to properly keep the environment clean. The 2D computer game was developed in Unity, using the programming language c#.