Alien Outpost

Aliens have invaded Earth. Few humans escaped to Mars. Aliens are trying to eliminate them. Resources are scarce, you cannot heal. 

Bring down all 3 Outposts to win. Collect Rocks (Hold right click for a few seconds) to make Radio Stones and destroy outposts (Also hold right click for more than the time for rocks). Left click to shoot . Try not to die. You are our last hope. Good Luck!