Blast through horrifyingly dangerous Demons with your Assault Rifle and survive the Gates of Hell for as long as humanly possible! Fight Demented Pineapples and Tough-as-Nails Zombies and a few other demons!
Press the buttons with a mouse or if you're able to use a touch screen (ie. a laptop with a touchscreen monitor), touch them.
Use the [-] / [+] keys to adjust volume in the Options menu.