Vampire Comet

Controls:

    WASD to move
    Shift to Dodge
    Up Arrow to Fire
    Enter to confirm guess

Avoid or Shoot Down obstacles
Blood goes down over time, and goes down faster to refill ammo.
Meteors have a chance to drop powerups, while UFOs always give you blood.
UFO health is variable, and awards more blood the higher its health is.
If you run out of blood you lose health and gain 25 more.
If you run out of health you die.

Powerups either increase your health, decrease the cooldown between lasers or decrease the cost of the dodge ability.

Additionally, while playing you must count the number of meteors you come across. 
When prompted, shoot the corresponding numbers to the number of meteors you passed since you last were asked to guess, then press ENTER.

Destroying meteors either by shooting them or hitting them will remove them from the count.