再调整堆积模式：

三个难度都用100高度场地
第二个难度四/五连块2包：1包混合
第三个难度纯五连块

parts/language/lang_en.lua

@@ -740,9 +740,9 @@ return{
 		['dig_1000l']=			{"Dig",				"1000L",		"Dig 1000 garbage lines."},
 		['drought_n']=			{"Drought",			"100L",			"There are no I-pieces."},
 		['drought_l']=			{"Drought+",		"100L",			"W T F"},
-		['stack_20l']=			{"Stack",			"20L",			"Pack them!"},
-		['stack_40l']=			{"Stack",			"40L",			"Pack them!"},
-		['stack_100l']=			{"Stack",			"100L",			"Pack them!"},
+		['stack_e']=			{"Stack",			"EASY",			"Pack them!"},
+		['stack_h']=			{"Stack",			"HARD",			"Pack them!"},
+		['stack_u']=			{"Stack",			"ULTIMATE",		"Pack them!"},
 		['marathon_n']=			{"Marathon",		"NORMAL",		"200-line marathon with accelerating speed."},
 		['marathon_h']=			{"Marathon",		"HARD",			"200-line high-speed marathon."},
 		['solo_e']=				{"Battle",			"EASY",			"Defeat the AI!"},