Defend against endless, randomly-generated alien hordes that are attacking your planet! Left and Right arrows keys to move, press space to fire blaster. In order to start a wave, click the little button in the bottom left corner. The waves are randomly generated, so no two games are the same. On the right bar is (from top to bottom) the upgrades you can apply to your ship. Upgrade speed is upgrading how fast your ship moves (from left to right), while upgrade launch speed is decreasing the blaster reload time. Below that is the money you have. You get money from destroying alien ships. Use this to buy upgrades. Below that is the enemy health. Every wave will have five or less enemies. Below that is the lives you have. These are the enemies: Basic: Average speed 3 hit points Takes away one life Gives 5 money upon death Speedy: Fast speed 3 hit points Takes away one life Gives 10 money upon death Big: Slow speed 10 hit points Takes three lives Gives 20 money upon death Regenerator: Average speed 5 hit points Takes two lives Gives 50 money Special: Regenerates health over time Big Speeder: Fast Speed 10 Hit points Takes 4 lives Rewards with 100 money Big Regenerator Slow Speed 20 Hit points Takes 4 lives Rewards with 200 money Special: Regenerates health (twice as fast as the normal Regenerator) Big Alien Normal Speed Hit Points: Varies; increases as the waves go on (Starts at around 100) Takes 5 lives Rewards 500 money
