Catch A Letter

This is my first game, it is a little test, i'll upgrade the game with many features and I hope the game will give you a little fun. In this Game, you must defend the space from arrow and make the best score for save the earth. FUN FUCT: In the early stage of development the game was based on letter but in the alpha there are only arrow =) The game is in Development, please suggest me some update that i can do. thank you and good play