I Don't Think It's A UFO, Aloysius: INVASION

You have been tasked with clearing out the quantum asteroid field near your home planet, when suddenly a flying saucer appears. As you approach for a closer look, you think to yourself, "This can't be a UFO, it's got teeth!" Before you can ponder on the conundrum any further, the toothy invader opens fire! 

Destroy quantum asteroids and fight off the impending invasion while racking up your high score!