Click and move your mouse to fire the laser at the enemies before they reach you. Be careful though, as you have limited energy. Survive for as long as you can POWERUPS require more energy to claim them the longer you wait! Kill them with your laser ! The darker red the enemy is, the more health it has. Powerups: Charge refills your charge bar by 1/5th Health fully heals you, but it takes 2x longer to get then the others The shield powerup puts a shield around the player that lasts for 8 second, killing all enemies that touch it.