Can some one tell the best android game development engine to use when developing a 2d mobile game? Compare it with other engines?

A few years ago I started studying game development and got bored after seeing the script editing window. Since then I give my genius ideas to a good game design company. I am sure that in this case the games are more thoroughly developed. The important thing is that they get a release. And what do you think of it?

Unity Mobile is very good engine to create2D &3D Games  friendly with user and simple for beginnerSupports IOS and Android.

Unity is a good engine, you can use it to develop 2D or 3D games , it also can export the game to different platforms : iOS, android.