The original music pieces can be downloaded for free from the following places:

':
http://www.newgrounds.com/audio/listen/277058

8-Bit Crawling:
http://www.newgrounds.com/audio/listen/284420

8 Bit Owls:
http://www.newgrounds.com/audio/listen/474628

Data at Epoch:
http://www.newgrounds.com/audio/listen/397427

Defective Cartridge:
http://www.newgrounds.com/audio/listen/398177

Dungeon:
http://www.newgrounds.com/audio/listen/295981

Heart of Courage:
http://www.newgrounds.com/audio/listen/480110

Hero Rising:
http://www.newgrounds.com/audio/listen/415651

Serve Chilled:
http://www.newgrounds.com/audio/listen/477656

These Walls:
http://www.newgrounds.com/audio/listen/497518

Trifork:
http://www.newgrounds.com/audio/listen/338649
