diff --git a/01_Acey_Ducey/aceyducey.bas b/01_Acey_Ducey/aceyducey.bas
index 2c8b1c3b..0b6f72db 100644
--- a/01_Acey_Ducey/aceyducey.bas
+++ b/01_Acey_Ducey/aceyducey.bas
@@ -10,7 +10,7 @@
 80 PRINT"IF YOU DO NOT WANT TO BET, INPUT A 0"
 100 N=100
 110 Q=100
-120 PRINT "YOU NOW HAVE";Q;"DOLLARS."
+120 PRINT "YOU NOW HAVE ";Q;" DOLLARS."
 130 PRINT
 140 GOTO 260
 210 Q=Q+M
diff --git a/03_Animal/kotlin/Animal.kt b/03_Animal/kotlin/Animal.kt
new file mode 100644
index 00000000..bac9af08
--- /dev/null
+++ b/03_Animal/kotlin/Animal.kt
@@ -0,0 +1,119 @@
+/**
+ * ANIMAL
+ *
+ *
+ * Converted from BASIC to Kotlin by John Long (@patimen)
+ *
+ * Animal is basically a perfect example of a binary tree. Implement it
+ * as such, with the QuestionNode either having an answer if it is a terminal node
+ * or a Question
+ */
+
+fun main() {
+    printIntro()
+    val rootQuestionNode =
+        QuestionOrAnswer(question = Question("DOES IT SWIM", QuestionOrAnswer("FISH"), QuestionOrAnswer("BIRD")))
+    while (true) {
+        val choice = ask("ARE YOU THINKING OF AN ANIMAL")
+        when {
+            choice == "LIST" -> printKnownAnimals(rootQuestionNode)
+            choice.startsWith("Q") -> return
+            choice.startsWith("Y") -> {
+                // A wrong answer means it's a new animal!
+                val wrongAnswer = rootQuestionNode.getWrongAnswer()
+                if (wrongAnswer == null) {
+                    // The computer got the right answer!
+                    println("WHY NOT TRY ANOTHER ANIMAL?")
+                } else {
+                    // Get a new question to ask next time
+                    wrongAnswer.askForInformationAndSave()
+                }
+            }
+        }
+    }
+}
+
+// Takes care of asking a question (on the same line) and getting
+// an answer or a blank string
+fun ask(question: String): String {
+    print("$question? ")
+    return readLine()?.uppercase() ?: ""
+}
+
+// Special case for a "yes or no" question, returns true of yes
+fun askYesOrNo(question: String): Boolean {
+    return generateSequence {
+        print("$question? ")
+        readLine()
+    }.firstNotNullOf { yesOrNo(it) }
+}
+
+// If neither Y (true) or N (false), return null, so the above sequence
+// will just keep executing until it gets the answer
+private fun yesOrNo(string: String): Boolean? =
+    when (string.uppercase().firstOrNull()) {
+        'Y' -> true
+        'N' -> false
+        else -> null
+    }
+
+private fun printKnownAnimals(question: QuestionOrAnswer) {
+    println("\nANIMALS I ALREADY KNOW ARE:")
+    val animals = question.getAnswers().chunked(4)
+    animals.forEach { line ->
+        // The '*' in front of line.toTypedArray() "spreads" the array as a list of parameters instead
+        System.out.printf("%-15s".repeat(line.size), *line.toTypedArray())
+        println()
+    }
+}
+
+private fun printIntro() {
+    println("                                ANIMAL")
+    println("              CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY")
+    println("\n\n")
+    println("PLAY 'GUESS THE ANIMAL'")
+    println("\n")
+    println("THINK OF AN ANIMAL AND THE COMPUTER WILL TRY TO GUESS IT.")
+}
+
+class QuestionOrAnswer(private var answer: String? = null, var question: Question? = null) {
+    fun getAnswers(): List<String> = answer?.let { listOf(it) } ?: question!!.getAnswers()
+    fun getWrongAnswer(): QuestionOrAnswer? {
+        if (answer != null) {
+            // "takeUnless" will return null if the answer is "yes". In this case
+            // we will return the "wrong answer", aka the terminal answer that was incorrect
+            return this.takeUnless { askYesOrNo("IS IT A $answer") }
+        }
+        return question?.getWrongAnswer()
+    }
+
+    fun askForInformationAndSave() {
+        //Failed to get it right and ran out of questions
+        //Let's ask the user for the new information
+        val newAnimal = ask("THE ANIMAL YOU WERE THINKING OF WAS A")
+        val newQuestion = ask("PLEASE TYPE IN A QUESTION THAT WOULD DISTINGUISH A \n$newAnimal FROM A $answer\n")
+        val newAnswer = askYesOrNo("FOR A $newAnimal THE ANSWER WOULD BE")
+
+        val trueAnswer = if (newAnswer) newAnimal else answer
+        val falseAnswer = if (newAnswer) answer else newAnimal
+        // Replace our answer with null  and set the question with the data we just got
+        // This makes it a question instead of an answer
+        this.answer = null
+        this.question = Question(newQuestion, QuestionOrAnswer(trueAnswer), QuestionOrAnswer(falseAnswer))
+    }
+}
+
+class Question(
+    private val question: String,
+    private val trueAnswer: QuestionOrAnswer,
+    private val falseAnswer: QuestionOrAnswer
+) {
+    fun getAnswers(): List<String> = trueAnswer.getAnswers() + falseAnswer.getAnswers()
+
+    fun getWrongAnswer(): QuestionOrAnswer? =
+        if (askYesOrNo(question)) {
+            trueAnswer.getWrongAnswer()
+        } else {
+            falseAnswer.getWrongAnswer()
+        }
+}
diff --git a/03_Animal/kotlin/README.md b/03_Animal/kotlin/README.md
new file mode 100644
index 00000000..f43a5b70
--- /dev/null
+++ b/03_Animal/kotlin/README.md
@@ -0,0 +1,3 @@
+Original source downloaded [from Vintage Basic](http://www.vintage-basic.net/games.html)
+
+Conversion to [Kotlin](https://kotlinlang.org/)
diff --git a/61_Math_Dice/perl/mathdice.pl b/61_Math_Dice/perl/mathdice.pl
index f5a92459..4a2b6f6e 100644
--- a/61_Math_Dice/perl/mathdice.pl
+++ b/61_Math_Dice/perl/mathdice.pl
@@ -25,24 +25,25 @@ sub game_play {
 		$sum = $sum + $roll;			# keeping track of the summary
 		#print "Sum: $sum Roll: $roll\n";
 		if ($num == 1) {
-			print "      +\n";			# if its the first roll then print an addition sign
+			print "\n   +\n\n";			# if its the first roll then print an addition sign
 		}
 		if ($num == 2) {
-			print "      =\n";			# if its the second roll print the equals sign and wait for an answer
+			print "     =? ";			# if its the second roll print the equals sign and wait for an answer
 			my $answer = <STDIN>;
 			chomp($answer);
 			if ($answer == 0) {
 				die "You input '0', Thanks for playing!\n";
 			}
 			elsif ($answer == $sum) {
-				print "RIGHT!\nTHE DICE ROLL AGAIN\n";
+				print "RIGHT!\n\nTHE DICE ROLL AGAIN\n\n";
 			}
 			else {						# code execution if they don't get the right answer
 				print "NO,COUNT THE SPOTS AND GIVE ANOTHER ANSWER\n";
+				print "     =? ";
 				$answer = <STDIN>;
 				chomp($answer);
 				if ($answer == $sum){
-					print "RIGHT!\nTHE DICE ROLL AGAIN\n";
+					print "RIGHT!\n\nTHE DICE ROLL AGAIN\n\n";
 				}
 			    else {
 					print "N0, THE ANSWER IS $sum\n";
diff --git a/90 Tower/csharp/Tower.sln b/90_Tower/csharp/Tower.sln
similarity index 100%
rename from 90 Tower/csharp/Tower.sln
rename to 90_Tower/csharp/Tower.sln
diff --git a/90 Tower/csharp/Tower/Game.cs b/90_Tower/csharp/Tower/Game.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/Game.cs
rename to 90_Tower/csharp/Tower/Game.cs
diff --git a/90 Tower/csharp/Tower/Models/Needle.cs b/90_Tower/csharp/Tower/Models/Needle.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/Models/Needle.cs
rename to 90_Tower/csharp/Tower/Models/Needle.cs
diff --git a/90 Tower/csharp/Tower/Models/Towers.cs b/90_Tower/csharp/Tower/Models/Towers.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/Models/Towers.cs
rename to 90_Tower/csharp/Tower/Models/Towers.cs
diff --git a/90 Tower/csharp/Tower/Program.cs b/90_Tower/csharp/Tower/Program.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/Program.cs
rename to 90_Tower/csharp/Tower/Program.cs
diff --git a/90 Tower/csharp/Tower/Resources/Congratulations.txt b/90_Tower/csharp/Tower/Resources/Congratulations.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/Congratulations.txt
rename to 90_Tower/csharp/Tower/Resources/Congratulations.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskCountPrompt.txt b/90_Tower/csharp/Tower/Resources/DiskCountPrompt.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskCountPrompt.txt
rename to 90_Tower/csharp/Tower/Resources/DiskCountPrompt.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskCountQuit.txt b/90_Tower/csharp/Tower/Resources/DiskCountQuit.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskCountQuit.txt
rename to 90_Tower/csharp/Tower/Resources/DiskCountQuit.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskCountRetry.txt b/90_Tower/csharp/Tower/Resources/DiskCountRetry.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskCountRetry.txt
rename to 90_Tower/csharp/Tower/Resources/DiskCountRetry.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskNotInPlay.txt b/90_Tower/csharp/Tower/Resources/DiskNotInPlay.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskNotInPlay.txt
rename to 90_Tower/csharp/Tower/Resources/DiskNotInPlay.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskPrompt.txt b/90_Tower/csharp/Tower/Resources/DiskPrompt.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskPrompt.txt
rename to 90_Tower/csharp/Tower/Resources/DiskPrompt.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskQuit.txt b/90_Tower/csharp/Tower/Resources/DiskQuit.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskQuit.txt
rename to 90_Tower/csharp/Tower/Resources/DiskQuit.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskRetry.txt b/90_Tower/csharp/Tower/Resources/DiskRetry.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskRetry.txt
rename to 90_Tower/csharp/Tower/Resources/DiskRetry.txt
diff --git a/90 Tower/csharp/Tower/Resources/DiskUnavailable.txt b/90_Tower/csharp/Tower/Resources/DiskUnavailable.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/DiskUnavailable.txt
rename to 90_Tower/csharp/Tower/Resources/DiskUnavailable.txt
diff --git a/90 Tower/csharp/Tower/Resources/IllegalMove.txt b/90_Tower/csharp/Tower/Resources/IllegalMove.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/IllegalMove.txt
rename to 90_Tower/csharp/Tower/Resources/IllegalMove.txt
diff --git a/90 Tower/csharp/Tower/Resources/Instructions.txt b/90_Tower/csharp/Tower/Resources/Instructions.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/Instructions.txt
rename to 90_Tower/csharp/Tower/Resources/Instructions.txt
diff --git a/90 Tower/csharp/Tower/Resources/Intro.txt b/90_Tower/csharp/Tower/Resources/Intro.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/Intro.txt
rename to 90_Tower/csharp/Tower/Resources/Intro.txt
diff --git a/90 Tower/csharp/Tower/Resources/NeedlePrompt.txt b/90_Tower/csharp/Tower/Resources/NeedlePrompt.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/NeedlePrompt.txt
rename to 90_Tower/csharp/Tower/Resources/NeedlePrompt.txt
diff --git a/90 Tower/csharp/Tower/Resources/NeedleQuit.txt b/90_Tower/csharp/Tower/Resources/NeedleQuit.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/NeedleQuit.txt
rename to 90_Tower/csharp/Tower/Resources/NeedleQuit.txt
diff --git a/90 Tower/csharp/Tower/Resources/NeedleRetry.txt b/90_Tower/csharp/Tower/Resources/NeedleRetry.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/NeedleRetry.txt
rename to 90_Tower/csharp/Tower/Resources/NeedleRetry.txt
diff --git a/90 Tower/csharp/Tower/Resources/PlayAgainPrompt.txt b/90_Tower/csharp/Tower/Resources/PlayAgainPrompt.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/PlayAgainPrompt.txt
rename to 90_Tower/csharp/Tower/Resources/PlayAgainPrompt.txt
diff --git a/90 Tower/csharp/Tower/Resources/Strings.cs b/90_Tower/csharp/Tower/Resources/Strings.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/Strings.cs
rename to 90_Tower/csharp/Tower/Resources/Strings.cs
diff --git a/90 Tower/csharp/Tower/Resources/TaskFinished.txt b/90_Tower/csharp/Tower/Resources/TaskFinished.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/TaskFinished.txt
rename to 90_Tower/csharp/Tower/Resources/TaskFinished.txt
diff --git a/90 Tower/csharp/Tower/Resources/Thanks.txt b/90_Tower/csharp/Tower/Resources/Thanks.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/Thanks.txt
rename to 90_Tower/csharp/Tower/Resources/Thanks.txt
diff --git a/90 Tower/csharp/Tower/Resources/Title.txt b/90_Tower/csharp/Tower/Resources/Title.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/Title.txt
rename to 90_Tower/csharp/Tower/Resources/Title.txt
diff --git a/90 Tower/csharp/Tower/Resources/TooManyMoves.txt b/90_Tower/csharp/Tower/Resources/TooManyMoves.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/TooManyMoves.txt
rename to 90_Tower/csharp/Tower/Resources/TooManyMoves.txt
diff --git a/90 Tower/csharp/Tower/Resources/YesNoPrompt.txt b/90_Tower/csharp/Tower/Resources/YesNoPrompt.txt
similarity index 100%
rename from 90 Tower/csharp/Tower/Resources/YesNoPrompt.txt
rename to 90_Tower/csharp/Tower/Resources/YesNoPrompt.txt
diff --git a/90 Tower/csharp/Tower/Tower.csproj b/90_Tower/csharp/Tower/Tower.csproj
similarity index 100%
rename from 90 Tower/csharp/Tower/Tower.csproj
rename to 90_Tower/csharp/Tower/Tower.csproj
diff --git a/90 Tower/csharp/Tower/UI/Input.cs b/90_Tower/csharp/Tower/UI/Input.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/UI/Input.cs
rename to 90_Tower/csharp/Tower/UI/Input.cs
diff --git a/90 Tower/csharp/Tower/UI/Prompt.cs b/90_Tower/csharp/Tower/UI/Prompt.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/UI/Prompt.cs
rename to 90_Tower/csharp/Tower/UI/Prompt.cs
diff --git a/90 Tower/csharp/Tower/UI/TowerDisplay.cs b/90_Tower/csharp/Tower/UI/TowerDisplay.cs
similarity index 100%
rename from 90 Tower/csharp/Tower/UI/TowerDisplay.cs
rename to 90_Tower/csharp/Tower/UI/TowerDisplay.cs