模式文件支持多音乐随机播放，在对战模式中试用

parts/gametoolfunc.lua

@@ -751,7 +751,8 @@ do--function resetGameData(args)
 			end
 		end
 		BG.set(GAME.modeEnv.bg)
-		BGM.play(GAME.modeEnv.bgm)
+		local bgm=GAME.modeEnv.bgm
+		BGM.play(type(bgm)=="string"and bgm or type(bgm)=="table"and bgm[rnd(#bgm)])
 
 		TEXT.clear()
 		if GAME.modeEnv.royaleMode then

parts/modes/netBattle.lua

@@ -5,6 +5,7 @@ return{
 		freshLimit=15,
 		noMod=true,
 		bg="space",
+		bgm={"race","push","secret8th","secret7th","waterfall","oxygen","shining terminal","storm","rockblock","magicblock","cruelty"},
 	},
 	load=function()
 		PLY.newPlayer(1)