Halt the Annihilation (LD50)

My entry for the 50th Ludum Dare game jam. The theme was "delay the inevitable". I decided to create a game where you have to purchase upgrades to stop the world from dying. I would strongly recommend doing the tutorial (click the question mark) before starting your first game. All music can be found here: https://spaceranger114.bandcamp.com/album/halt-the-annihilation-ost