Rename the misleadingly-named AmmoSchemeModel to GameSchemeModel AmmoSchemeModel was a misleading name, this class was actually used only for game schemes.

sky = 179, 243, 243
border = 128, 128, 128
music = Nature.ogg
clouds = 0
flakes = 0, 0, 0, 0, 0
sd-tint = $a5, $5d, $92, $ff