Rework star tower

src/main/java/emu/nebula/data/resources/StarTowerDef.java

@@ -21,8 +21,8 @@ public class StarTowerDef extends BaseDef {
         return Id;
     }
 
-    public int getMaxFloor(int stage) {
-        int index = stage - 1;
+    public int getMaxFloor(int stageNum) {
+        int index = stageNum - 1;
         
         if (index < 0 || index >= this.FloorNum.length) {
             return 0;