diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Snake.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Snake.java
index fbcccad78..6f9fbb482 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Snake.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/actors/mobs/Snake.java
@@ -59,7 +59,7 @@ public class Snake extends Mob {
 	@Override
 	public String defenseVerb() {
 		dodges++;
-		if (dodges >= 5 && !Badges.isUnlocked(Badges.Badge.BOSS_SLAIN_1)){
+		if (dodges >= 3 && !Badges.isUnlocked(Badges.Badge.BOSS_SLAIN_1)){
 			GLog.w(Messages.get(this, "hint"));
 			dodges = 0;
 		}
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 28a5a9703..20452a91e 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/levels/RegularLevel.java
@@ -398,14 +398,13 @@ public abstract class RegularLevel extends Level {
 			}
 		}
 
-		//these are dropped specially
+		//a total of 8 pages drop randomly, 2 pages are specially dropped
 		missingPages.remove(Document.GUIDE_INTRO_PAGE);
 		missingPages.remove(Document.GUIDE_SEARCH_PAGE);
 
-		int foundPages = allPages.size() - (missingPages.size() + 2);
-
 		//chance to find a page scales with pages missing and depth
-		if (missingPages.size() > 0 && Random.Float() < (Dungeon.depth/(float)(foundPages + 1))){
+		float dropChance = (missingPages.size() + Dungeon.depth) / (float)(allPages.size() - 2);
+		if (Random.Float() < dropChance){
 			GuidePage p = new GuidePage();
 			p.page(missingPages.get(0));
 			int cell = randomDropCell();
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/HeroSelectScene.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/HeroSelectScene.java
index bde07d40f..634d5fc7c 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/HeroSelectScene.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/HeroSelectScene.java
@@ -199,7 +199,7 @@ public class HeroSelectScene extends PixelScene {
 
 		btnExit = new ExitButton();
 		btnExit.setPos( Camera.main.width - btnExit.width(), 0 );
-		add( btnExit );
+		if (!SPDSettings.intro()) add( btnExit );
 
 		PointerArea fadeResetter = new PointerArea(0, 0, Camera.main.width, Camera.main.height){
 			@Override
@@ -272,7 +272,11 @@ public class HeroSelectScene extends PixelScene {
 
 	@Override
 	protected void onBackPressed() {
-		ShatteredPixelDungeon.switchScene( TitleScene.class );
+		if (!SPDSettings.intro()){
+			ShatteredPixelDungeon.switchScene(TitleScene.class);
+		} else {
+			super.onBackPressed();
+		}
 	}
 
 	private class HeroBtn extends StyledButton {
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/WelcomeScene.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/WelcomeScene.java
index 3133fbc35..2713c93b2 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/WelcomeScene.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/scenes/WelcomeScene.java
@@ -52,7 +52,7 @@ public class WelcomeScene extends PixelScene {
 
 		final int previousVersion = SPDSettings.version();
 
-		if (ShatteredPixelDungeon.versionCode == previousVersion) {
+		if (ShatteredPixelDungeon.versionCode == previousVersion && !SPDSettings.intro()) {
 			ShatteredPixelDungeon.switchNoFade(TitleScene.class);
 			return;
 		}
@@ -96,7 +96,7 @@ public class WelcomeScene extends PixelScene {
 			@Override
 			protected void onClick() {
 				super.onClick();
-				if (previousVersion == 0){
+				if (previousVersion == 0 || SPDSettings.intro()){
 					SPDSettings.version(ShatteredPixelDungeon.versionCode);
 					GamesInProgress.selectedClass = null;
 					GamesInProgress.curSlot = 1;
@@ -110,7 +110,7 @@ public class WelcomeScene extends PixelScene {
 
 		float buttonY = Math.min(topRegion + (PixelScene.landscape() ? 60 : 120), h - 24);
 
-		if (previousVersion != 0){
+		if (previousVersion != 0 && !SPDSettings.intro()){
 			StyledButton changes = new StyledButton(Chrome.Type.GREY_BUTTON_TR, Messages.get(TitleScene.class, "changes")){
 				@Override
 				protected void onClick() {
@@ -134,7 +134,7 @@ public class WelcomeScene extends PixelScene {
 
 		RenderedTextBlock text = PixelScene.renderTextBlock(6);
 		String message;
-		if (previousVersion == 0) {
+		if (previousVersion == 0 || SPDSettings.intro()) {
 			message = Messages.get(this, "welcome_msg");
 		} else if (previousVersion <= ShatteredPixelDungeon.versionCode) {
 			if (previousVersion < LATEST_UPDATE){