This reverts commit 99d6da5990bed75097b70926f7622d852a38080a, reversing changes made to c4914eedd844b97661796b3b2c8abfa78353dfc5.
- Change background images as I am not sure the other really are CC0 - Change music to remixes from ocremix.org - Split code into several files - Change setting dialog layout - Add splashscreen - Minor fixes