This is a lazer shootout game that I made, you'll have protect the city by shooting the enemies and defeat the boss. [Click] - Shoot [Click+space] - Bigger shoot [H] - Increase health using 5 powers. (Only if you have enough powers.) [Arrow keys] - Move the cannon. Note: You cannot move while shooting. You will lose your power and health if you touch the enemies. You can improve your powers by collecting power-ups or once you have destroyed an enemy. When the cannon flashes red, it means that you don't have enough power and you are losing your health. Credits: Thanks to @HappyLittlePrincess for some ideas.