High score goes to Ashgreninjarule for 218 score. Beating the game adds 30 more score. Use mouse to move. Dodge any thing that is coming towards you. The boss appears when you get to score 50. Shoot the UFOs. You can destroy the projectiles, not the ones the boss shoots though. The boss will do a 360 turn and during that it is invincible. Move using mouse or finger. You can play it on mobile!!
Update!!! I did what @ADAMISADMIN asked and now if you tap the screen or press space when the cool-down = 0, it will fire an energy blast that will slowly fade away. This does tons of damage to the bosses. If you tap the screen or press space, it triggers the blast.