A free app for Android, by Tian Game Valley.
In this game, you will get to explore many different planets, and even visit various stars in the galaxy. However, you will have to be careful of the many different types of enemies that you will encounter, including but not limited to: other players, space anomalies, and even giant bosses!
The goal is to defeat all the different enemies, and in order to do so, you will need to upgrade your ship with many different types of weapons. However, you will also have to manage your energy, since you will need to use your energy to both attack enemies and for other purposes, such as moving around the galaxy or exploring the planets.