Add more menus and endless mode

objects/o_parent_enemy/Create_0.gml

@@ -1,4 +1,4 @@
 event_inherited();
 get_damaged_create(100);
 
-global.totalEnemiesSpawned++;
+global.total_enemies_spawned++;

objects/o_parent_enemy/Other_7.gml

@@ -1,11 +1,17 @@
 if sprite_index == sprites[4] {
-	global.enemyKillCount++;
+	global.kill_count++;
+	global.current_score++;
 	
 	// Drop healing milk
 	var _drop_chance = 10;
+	
+	if global.infinite_mode {
+		_drop_chance = 5;
+	}
+	
 	var _chance = irandom(100);
 	
-	if global.enemyKillCount mod 20 == 0 || _chance <= _drop_chance {
+	if ((!global.infinite_mode && global.kill_count mod 20 == 0) || _chance <= _drop_chance) {
 		instance_create_depth(x, y, -600, o_potion);
 	}