Original assets from freesound.org. Modified where neccessary.

Original authors:

"ambience.mp3" - kvgarlic
"coins.wav" - altfuture
"explosion.wav" - tommccann
"fanfare.mp3" - neonaeon
"gameover.mp3" - benboncan
"reverse.wav" - jorickhoofd
"scream.wav" - adriancalzon
"splat.wav" - foolboymedia
"stop.wav" - jorickhoofd
"woosh.wav" - wjl