DLTW - Dont let them win

A small game made for Ludum Dare 2017 Its a game where aliens are invading, and only you can save the world! yeah not the best story. It was the first thing it came to my mind. The game is very difficult so expect to die a few times. UPDATE 27/04/2017 2:14 a.m. Fixed a bug where you can win instantly with the mouse left button