This post was inspired by the question at the following link.

https://elearning.adobe.com/2018/09/help-javascript-noobie-javascript-adobe-captivate/

I went ahead and worked up a tic-tac-toe game that I hope may be helpful not only for the original poster but  for any others as well that may be trying this.

A couple differences –
1.  Sounds like original poster was jumping between slides – My interaction is all on a single slide.
2.  I got the impression that the original poster was creating a sort of “Hollywood Squares” type game where right or wrong answers to questions dictate whether a box gets the ‘X’ or ‘O’. My game is just straight up Tic-Tac-Toe. I chose to add a way to track the score as well for added value.

A Few Initial Considerations –
1.  There are a total of 16 winning combinations. Eight for ‘X’ and eight for ‘O’.
2.  There are a total of 8 lines to draw for a winning game.
3.  We need to keep track of whose turn it is.
4.  There are three states for each box. (Blank, X, and O)
5. When the game is over. The game board needs to stop functioning until a new game is started.

The Variables –
I used a total of 21 variables.
One for each square labeled box1, box2, box3, etc.  –  in order to track if a box had already been selected. (9)
One for each square labeled a1Choice, b1Choice, c1Choice, etc  –  in order to track whether an ‘X’ or an ‘O’ was placed there. (9)
One called playerTurn to determine whether an ‘X’ or an ‘O’ gets placed when a box is clicked. (1)
One called score1 for displaying the score for player 1. (1)
One called score2 for displaying the score for player 2. (1)

The States – 
Each square is named a1 through c3 and has three states. Blank is normal, ‘X’ is called drawX, and ‘O’ is called drawO.
The player 1 and player 2 tags have two states each. One for red and one for green.
The win line that is drawn is named winLine and has 9 states. Normal is duplicated. The other eight are placed across the game board and named for the squares they cross. (i.e.  a1a2a3)

Each box is a button that executes JavaScript on success.

The Code –
The JavaScript that is used for every box needs to perform the same functions as follows in order…
1.  Check if the square already has an ‘X’ or ‘O’ in it. Each box has a value of zero to begin. When a box is clicked the first time the variable is set to 1 and a player check is done.
2.  The player check looks at the playerTurn variable to see if it is set as 1 or 2. If it is 1 we draw an ‘X’. If it is 2 we draw an ‘O’.
3.  The playerTurn variable is changed
4.  The choice variable for the square is  set to 1 for an ‘X’ and 2 for an ‘O’. The default is zero at game start.
5.  The states for the player tags switch between red and green.
6.  A series of conditional statements are run to look for a win.
7.  If there is a winner – we display the win line and change the state to reflect the direction of the win, increment the score, and disable the boxes.

The ‘New Game’ button simply resets all the variables and states to their initial value with the exception of the scores and re-enables the boxes.
The ‘Reset Scores’ only changes the score1 and score2 variables back to 0.
Here is a look at the code on the upper left square (box1). Please note that the first portion changes a bit to reflect the box being clicked on. I am sure there is an easier way to shorten this but I am a bit of a beginner in this myself.

if (window.box1==0) {
box1=1;

if (window.playerTurn==1) {
cp.changeState(“a1″,”drawX”);
playerTurn=2;
a1Choice=1;
cp.changeState(“player1″,”Normal”);
cp.changeState(“player2″,”myTurn”);
}

else if (window.playerTurn==2) {
cp.changeState(“a1″,”drawO”);
playerTurn=1;
a1Choice=2;
cp.changeState(“player1″,”myTurn”);
cp.changeState(“player2″,”Normal”);
}

}

function disableAll() {
cp.disable(“a1”);
cp.disable(“a2”);
cp.disable(“a3”);
cp.disable(“b1”);
cp.disable(“b2”);
cp.disable(“b3”);
cp.disable(“c1”);
cp.disable(“c2”);
cp.disable(“c3”);
}

if ((window.a1Choice==1) && (window.b1Choice==1) && (window.c1Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a1b1c1″);
score1=(++score1);
disableAll();
}

if ((window.a1Choice==2) && (window.b1Choice==2) && (window.c1Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a1b1c1″);
score2=(++score2);
disableAll();
}

if ((window.a2Choice==1) && (window.b2Choice==1) && (window.c2Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a2b2c2″);
score1=(++score1);
disableAll();
}

if ((window.a2Choice==2) && (window.b2Choice==2) && (window.c2Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a2b2c2″);
score2=(++score2);
disableAll();
}

if ((window.a3Choice==1) && (window.b3Choice==1) && (window.c3Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a3b3c3″);
score1=(++score1);
disableAll();
}

if ((window.a3Choice==2) && (window.b3Choice==2) && (window.c3Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a3b3c3″);
score2=(++score2);
disableAll();
}

if ((window.a1Choice==1) && (window.a2Choice==1) && (window.a3Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a1a2a3″);
score1=(++score1);
disableAll();
}

if ((window.a1Choice==2) && (window.a2Choice==2) && (window.a3Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a1a2a3″);
score2=(++score2);
disableAll();
}

if ((window.b1Choice==1) && (window.b2Choice==1) && (window.b3Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”b1b2b3″);
score1=(++score1);
disableAll();
}

if ((window.b1Choice==2) && (window.b2Choice==2) && (window.b3Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”b1b2b3″);
score2=(++score2);
disableAll();
}

if ((window.c1Choice==1) && (window.c2Choice==1) && (window.c3Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”c1c2c3″);
score1=(++score1);
disableAll();
}

if ((window.c1Choice==2) && (window.c2Choice==2) && (window.c3Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”c1c2c3″);
score2=(++score2);
disableAll();
}

if ((window.a1Choice==1) && (window.b2Choice==1) && (window.c3Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a1b2c3″);
score1=(++score1);
disableAll();
}

if ((window.a1Choice==2) && (window.b2Choice==2) && (window.c3Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a1b2c3″);
score2=(++score2);
disableAll();
}

if ((window.a3Choice==1) && (window.b2Choice==1) && (window.c1Choice==1)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a3b2c1″);
score1=(++score1);
disableAll();
}

if ((window.a3Choice==2) && (window.b2Choice==2) && (window.c1Choice==2)) {
cp.show(“winner”);
cp.show(“winLine”);
cp.changeState(“winLine”,”a3b2c1″);
score2=(++score2);
disableAll();
}

Here is the working game. Enjoy and let me know if you have any questionsl