diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ShatteredPixelDungeon.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ShatteredPixelDungeon.java
index 516233823..f8749ca1e 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ShatteredPixelDungeon.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ShatteredPixelDungeon.java
@@ -64,6 +64,13 @@ public class ShatteredPixelDungeon extends Game {
 				com.shatteredpixel.shatteredpixeldungeon.items.potions.brews.AquaBrew.class,
 				"com.shatteredpixel.shatteredpixeldungeon.items.spells.AquaBlast" );
 
+		com.watabou.utils.Bundle.addAlias(
+				com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.entrance.EntranceRoom.class,
+				"com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom.class" );
+		com.watabou.utils.Bundle.addAlias(
+				com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.exit.ExitRoom.class,
+				"com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.ExitRoom.class" );
+
 		//pre-v2.3.0
 		com.watabou.utils.Bundle.addAlias(
 				com.shatteredpixel.shatteredpixeldungeon.items.bombs.Bomb.ConjuredBomb.class,
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/LastShopLevel.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/LastShopLevel.java
index a56e536bf..1147f076e 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/LastShopLevel.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/LastShopLevel.java
@@ -33,8 +33,8 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.builders.LineBuilder;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.CityPainter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.ExitRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.entrance.EntranceRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.exit.ExitRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.ImpShopRoom;
 import com.shatteredpixel.shatteredpixeldungeon.messages.Messages;
 import com.watabou.noosa.Group;
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
index f06de625c..069c915b4 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
@@ -61,8 +61,8 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.MagicalFire
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.PitRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.ShopRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.SpecialRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.ExitRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.entrance.EntranceRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.exit.ExitRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.StandardRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.traps.BlazingTrap;
 import com.shatteredpixel.shatteredpixeldungeon.levels.traps.BurningTrap;
@@ -766,9 +766,9 @@ public abstract class RegularLevel extends Level {
 		rooms = new ArrayList<>( (Collection<Room>) ((Collection<?>) bundle.getCollection( "rooms" )) );
 		for (Room r : rooms) {
 			r.onLevelLoad( this );
-			if (r instanceof EntranceRoom ){
+			if (r.isEntrance()){
 				roomEntrance = r;
-			} else if (r instanceof ExitRoom ){
+			} else if (r.isExit()){
 				roomExit = r;
 			}
 		}
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/builders/RegularBuilder.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/builders/RegularBuilder.java
index 257e10d1d..942186b9b 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/builders/RegularBuilder.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/builders/RegularBuilder.java
@@ -26,8 +26,6 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.connection.Connecti
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.connection.MazeConnectionRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.secret.SecretRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.ShopRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.ExitRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.StandardRoom;
 import com.watabou.utils.Random;
 
@@ -98,9 +96,9 @@ public abstract class RegularBuilder extends Builder {
 		singleConnections.clear();
 		multiConnections.clear();
 		for (Room r : rooms){
-			if (r instanceof EntranceRoom){
+			if (r.isEntrance()){
 				entrance = r;
-			} else if (r instanceof ExitRoom) {
+			} else if (r.isExit()) {
 				exit = r;
 			} else if (r instanceof ShopRoom && r.maxConnections(Room.ALL) == 1){
 				shop = r;
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java
index f876b18bc..71844708f 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/painters/RegularPainter.java
@@ -31,7 +31,6 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.connection.ConnectionRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.SpecialRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.StandardRoom;
 import com.shatteredpixel.shatteredpixeldungeon.levels.traps.Trap;
 import com.watabou.noosa.Game;
@@ -260,7 +259,7 @@ public abstract class RegularPainter extends Painter {
 
 					//entrance doors on floor 1 are hidden during tutorial
 					//entrance doors on floor 2 are hidden if the player hasn't picked up 2nd guidebook page
-					if (r instanceof EntranceRoom || n instanceof EntranceRoom){
+					if (r.isEntrance() || n.isEntrance()){
 						if ((Dungeon.depth == 1 && SPDSettings.intro())
 							|| (Dungeon.depth == 2 && !Document.ADVENTURERS_GUIDE.isPageFound(Document.GUIDE_SEARCHING))) {
 							d.type = Room.Door.Type.HIDDEN;
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java
index c1bcc5bec..adb30bbe7 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/Room.java
@@ -282,6 +282,14 @@ public abstract class Room extends Rect implements Graph.Node, Bundlable {
 		}
 		connected.clear();
 	}
+
+	public boolean isEntrance(){
+		return false;
+	}
+
+	public boolean isExit(){
+		return false;
+	}
 	
 	// **** Painter Logic ****
 	
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MassGraveRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MassGraveRoom.java
index f48dea9ae..c8f4894cb 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MassGraveRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MassGraveRoom.java
@@ -34,7 +34,6 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.special.SpecialRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
 import com.shatteredpixel.shatteredpixeldungeon.messages.Messages;
 import com.shatteredpixel.shatteredpixeldungeon.tiles.CustomTilemap;
 import com.watabou.noosa.Image;
@@ -100,21 +99,21 @@ public class MassGraveRoom extends SpecialRoom {
 
 	@Override
 	public boolean canConnect(Room r) {
-		if (r instanceof EntranceRoom){
+		if (r.isEntrance()){
 			return false;
 		}
 
 		//must have at least 3 rooms between it and the entrance room
 		for (Room r1 : r.connected.keySet()) {
-			if (r1 instanceof EntranceRoom){
+			if (r1.isEntrance()){
 				return false;
 			}
 			for (Room r2 : r1.connected.keySet()) {
-				if (r2 instanceof EntranceRoom){
+				if (r2.isEntrance()){
 					return false;
 				}
 				for (Room r3 : r2.connected.keySet()) {
-					if (r3 instanceof EntranceRoom){
+					if (r3.isEntrance()){
 						return false;
 					}
 				}
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MineEntrance.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MineEntrance.java
index ea316a06e..515b01dfc 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MineEntrance.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/quest/MineEntrance.java
@@ -30,7 +30,7 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.features.LevelTransition;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.secret.SecretRoom;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.StandardRoom;
 import com.shatteredpixel.shatteredpixeldungeon.messages.Messages;
 import com.shatteredpixel.shatteredpixeldungeon.tiles.CustomTilemap;
 import com.watabou.noosa.Image;
@@ -41,7 +41,7 @@ import com.watabou.utils.Random;
 
 import java.util.ArrayList;
 
-public class MineEntrance extends EntranceRoom {
+public class MineEntrance extends StandardRoom {
 
 	@Override
 	public int minWidth() {
@@ -54,10 +54,8 @@ public class MineEntrance extends EntranceRoom {
 	}
 
 	@Override
-	public boolean canMerge(Level l, Point p, int mergeTerrain) {
-		//StandardRoom.canMerge
-		int cell = l.pointToCell(pointInside(p, 1));
-		return (Terrain.flags[l.map[cell]] & Terrain.SOLID) == 0;
+	public boolean isEntrance() {
+		return true;
 	}
 
 	@Override
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossEntranceRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossEntranceRoom.java
index 4af3530fc..9af583c30 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossEntranceRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossEntranceRoom.java
@@ -26,7 +26,7 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.features.LevelTransition;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.entrance.EntranceRoom;
 
 public class SewerBossEntranceRoom extends EntranceRoom {
 
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossExitRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossExitRoom.java
index ed4744fbb..1b31a950e 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossExitRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/sewerboss/SewerBossExitRoom.java
@@ -27,7 +27,7 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.features.LevelTransition;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.ExitRoom;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.exit.ExitRoom;
 import com.shatteredpixel.shatteredpixeldungeon.tiles.CustomTilemap;
 import com.watabou.noosa.Image;
 import com.watabou.noosa.Tilemap;
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/special/DemonSpawnerRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/special/DemonSpawnerRoom.java
index 6eb7dfad5..841ff4e46 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/special/DemonSpawnerRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/special/DemonSpawnerRoom.java
@@ -29,7 +29,6 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
-import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.EntranceRoom;
 import com.shatteredpixel.shatteredpixeldungeon.tiles.CustomTilemap;
 import com.watabou.noosa.Tilemap;
 import com.watabou.utils.Point;
@@ -61,8 +60,8 @@ public class DemonSpawnerRoom extends SpecialRoom {
 	@Override
 	public boolean connect(Room room) {
 		//cannot connect to entrance, otherwise works normally
-		if (room instanceof EntranceRoom) return false;
-		else                              return super.connect(room);
+		if (room.isExit())  return false;
+		else                return super.connect(room);
 	}
 
 	@Override
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/EntranceRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/entrance/EntranceRoom.java
similarity index 94%
rename from core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/EntranceRoom.java
rename to core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/entrance/EntranceRoom.java
index 1dddebf1b..33ffdc6c3 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/EntranceRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/entrance/EntranceRoom.java
@@ -19,7 +19,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard;
+package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.entrance;
 
 import com.shatteredpixel.shatteredpixeldungeon.Dungeon;
 import com.shatteredpixel.shatteredpixeldungeon.SPDSettings;
@@ -31,6 +31,7 @@ import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.features.LevelTransition;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.StandardRoom;
 import com.watabou.utils.Point;
 import com.watabou.utils.Random;
 
@@ -46,6 +47,11 @@ public class EntranceRoom extends StandardRoom {
 		return Math.max(super.minHeight(), 5);
 	}
 
+	@Override
+	public boolean isEntrance() {
+		return true;
+	}
+
 	@Override
 	public boolean canMerge(Level l, Point p, int mergeTerrain) {
 		return false;
@@ -117,8 +123,8 @@ public class EntranceRoom extends StandardRoom {
 	@Override
 	public boolean connect(Room room) {
 		//cannot connect to exit, otherwise works normally
-		if (room instanceof ExitRoom)   return false;
-		else                            return super.connect(room);
+		if (room.isExit())  return false;
+		else                return super.connect(room);
 	}
 	
 }
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ExitRoom.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/exit/ExitRoom.java
similarity index 91%
rename from core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ExitRoom.java
rename to core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/exit/ExitRoom.java
index 663d6572f..ab188734d 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/ExitRoom.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/rooms/standard/exit/ExitRoom.java
@@ -19,13 +19,14 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
-package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard;
+package com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.exit;
 
 import com.shatteredpixel.shatteredpixeldungeon.levels.Level;
 import com.shatteredpixel.shatteredpixeldungeon.levels.Terrain;
 import com.shatteredpixel.shatteredpixeldungeon.levels.features.LevelTransition;
 import com.shatteredpixel.shatteredpixeldungeon.levels.painters.Painter;
 import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.Room;
+import com.shatteredpixel.shatteredpixeldungeon.levels.rooms.standard.StandardRoom;
 import com.watabou.utils.Point;
 
 public class ExitRoom extends StandardRoom {
@@ -62,7 +63,7 @@ public class ExitRoom extends StandardRoom {
 	@Override
 	public boolean connect(Room room) {
 		//cannot connect to entrance, otherwise works normally
-		if (room instanceof EntranceRoom)   return false;
-		else                            return super.connect(room);
+		if (room.isEntrance())  return false;
+		else                    return super.connect(room);
 	}
 }