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HTML

              
                <div id="headboard">
    <h1><span>I'm invincible.</span></h1>
    <div id="textOutput"></div>
    <div><span id="gameCounter" title="Games played"></span><span id="status" Title="Status  &#10; Black: Ready to play &#10; Green: Game in progress"><span></span></span></div>  
</div>
<div id="help"><div></div></div>
<div id="machineCounter" title="Games I have won"></div>
<div id="playerCounter" title="Games you have won"></div>
<div id="container"></div>
              
            
!

CSS

              
                :root{
--size : min(85vw ,85vh);
--oneThird : calc(var(--size) / 3)
}
*{
cursor:default;
}
html,body{
height: 100%;
margin: 0;
}
body{
font-size: 16px;
font-family: sans-serif;
background-image: linear-gradient(75deg,white,  lightgray 5%,white 15%, lightgray 55% , lightgray 90%,white);
background-size: 100%;
background-attachment: fixed;
min-height: 300px;
display:flex;
flex-direction: column;
min-width:350px; 
  min-height: calc(var(--size) + 50px) ;
}
#container{
width: var(--size);
height: var(--size);
margin:auto;
}
#container>div{
width: var(--oneThird);
height: var(--oneThird);
display:inline-block;
vertical-align: top;
}
#container>div>div{
box-sizing: border-box;
width: 90%;
height: 90%;
margin:5%;
border-radius: 5%;
cursor:pointer;
border:1px solid transparent; 
background-color: rgb(255,255,255,.6);
background-color: rgb(0,0,0,.2);
transition: .1s;
}
#container>div>div:before{
overflow: hidden;
display: block;
line-height: 100%;;
width:100%;
height: 100%;
text-align: center;
border-radius: 50%;
font-size: calc( var(--oneThird) /1.1);
}
#container>div[marked=player]>div:before{
content:"✚";
color:green;
transform:rotate(45deg);
}
#container>div[marked=machine]>div:before{
content:"✚";
}
#container>div[empty=no]>div{
border-color:gray white white gray;
background-color:transparent;
cursor: default;
}
#headboard{
display:flex;
justify-content: space-between;
padding-top:2px;
height: 30px;
overflow: hidden;
}
h1{
margin:0;
font-size: 30px;
line-height: 24px;
font-weight: normal;
transition:.4s;
}
h1:before{
content:" (ง ͠° ͟ʖ ͡°)ง ";
font-size: 24px;
}
.nIn>span{
text-decoration:line-through double black;
}
.nIn:before{
content:  "(ง ˘ ʖ ˘ )ง !";
}
#textOutput{
position: absolute;
width: 100%;
top:20px;
font-weight: bold;
text-align: center;
font-size: 50px;
}
@keyframes output {
0% {transform:scale(0);}
5% {transform:scale(1.2);}
95% {transform:scale(1.2);}   
100% {transform:scale(1);}
}
#machineCounter,#playerCounter{
position: absolute;
background-color: aqua;
line-height: 60px;
width: 60px;
bottom: 0;
margin:5px;
text-align: center;
font-size: 32px;
background-color: black;
color:white;
border-radius: 50%;
transition:transform .16s ease-in-out, filter .31s;
}
#playerCounter{
right: 0;
background-color: green;
}
#status{
display:inline-block;
vertical-align: top;
width: 20px;
height: 20px;
background-color: black;
border-radius: 50%;
margin:2px 10px;
transition:.2s;
animation-name: rotates;
animation-duration: 5s;
animation-iteration-count: infinite;
animation-timing-function: linear;
}
#status[on]{
background-color: green;
animation-duration: 1s;
animation-direction: reverse;
}
#status>span{
display: block;
width: 5px;
height: 5px;
border-radius: 50%;
margin:auto;
background-color: white;
margin-top:1px;
opacity:.6;
}
@keyframes rotates {
0% {transform:rotate(360deg);}
100% {transform:rotate(0deg);}
}
#gameCounter{
display:inline-block;
vertical-align: top;
font-size: 24px;
line-height: 24px;
margin-right:5px;
background-color: rgba(0,0,0,.2);
padding:0 2px 0 10px ;
border-radius: 3px;
color:white;
}
#gameCounter:empty{
padding:0;
}
#help{
position:absolute;
bottom:5px;
width: 100%;
text-align:center;
font-size: 24px;
}
              
            
!

JS

              
                function initialize(){
    gameInProgress = true
    document.getElementById("status").setAttribute("on","")
    document.querySelectorAll("#container>DIV").forEach(function(box,i){
        var row = i<3 ? 0 : i>5 ? 2 : 1
        var col = i % 3
        box.setAttribute("marked","no")
        box.setAttribute("empty","yes")
        box.setAttribute("line"+row,"")
        box.setAttribute("line"+(col+3),"")
        box.firstChild.setAttribute("style","")// style.backgroundColor = ""
        if (row==col)box.setAttribute("line6","")
        if (row+col ==2 )box.setAttribute("line7","")
    })
    if (turn == "machine") {
        setTimeout(machineShift,500)
        boxClicked = false
        displayHelp("Check a box") 
    }else{
        setTimeout(function(){boxClicked= false;displayHelp("Make your move")},240)
    }
    turn = turn == "machine" ? "player" : "machine"
    displayText("· · ·","gray")
}

function displayText(text,color){
var output = document.getElementById("textOutput")
output.style.transition= "0s"
output.style.transform ="scale(0)"
output.style.color=color
output.style.filter="blur(100px)"
setTimeout(()=>{
    output.style.transition= ".3s ease-out"
    output.innerHTML=text;
    output.style.transform ="scale(1,.8) translateY(-2px)"//translateY(30px)"
    output.style.filter="blur(0px)"// drop-shadow(0 0 10px "+color+")"
    output.style.letterSpacing="8px"
},10)

}
function addEffect(id,value){
    var obj = document.getElementById(id)
    obj.style.transform ="scale(0)"
        obj.style.filter="blur(20px)"
        obj.style.transition = "0s"
        setTimeout(function(){
            obj.style.transition="transform .16s ease-in-out , filter .8s"
            obj.innerHTML=value
            obj.style.transform =""
            obj.style.filter=""
        },120)
}
function endGame(winner){   
    var text, color   
    if (winner == "machine"){
        text="I win"
        color ="black"
        counter[0]++
        addEffect("machineCounter",counter[0])
    }
    if (winner == "player"){
        text="You win"
        color ="green"
        counter[1]++        
        addEffect("playerCounter",counter[1])
    }
    if (winner == "tie"){
        text="We tied"
         color ="gray"        
    }
    counter[2]++
    addEffect("gameCounter",counter[2])
    displayText(text,color)
    document.querySelectorAll("#container>DIV[empty=yes]").forEach(function(box){
        box.setAttribute("empty","no")
        box.firstChild.style.backgroundColor = "rgba(0,0,0,.2)"
        box.firstChild.style.borderColor = "transparent"
    })
    document.getElementById("status").removeAttribute("on")
    setTimeout(function(){
        displayHelp("Click to play again")
        gameInProgress = false;
    },500)  
}
function checkBoard(option){
    for (var i=0 ; i<8 ;i++){
        var player = 0
        var machine = 0
        var boxEmpty = ""
        document.querySelectorAll("[line"+i+"]").forEach(function(box){
            if (box.getAttribute("marked") == "player") player++
            if (box.getAttribute("marked") == "machine") machine++
            if (box.getAttribute("marked") == "no") boxEmpty = box
        })
        switch (option){
            case "winning play":
                if (machine==2 && player==0 ){
                    boxEmpty.setAttribute("marked","machine")
                    boxEmpty.setAttribute("empty","no")
                    document.querySelectorAll("[line"+i+"]>div").forEach(function(box){
                        box.style.backgroundColor="white"
                    })
                    return true
                }
            break;
            case "cover winning play":
                if (machine==0 && player==2){
                    boxEmpty.setAttribute("marked","machine")
                    boxEmpty.setAttribute("empty","no")
                    return true
                }

            break;
            case "the player wins":
                if (player==3){
                    document.querySelectorAll("[line"+i+"]>div").forEach(function(box){
                        box.style.backgroundColor="white"
                    })
                    setTimeout(function(){document.querySelector("h1").className ="nIn"},120)
                    return true
                }
        }

    }
    return false
}
function machineShift(){
    if (checkBoard("winning play")){
        endGame("machine")
        return
    }
    if (!checkBoard("cover winning play")){
        var emptyBoxes = document.querySelectorAll("#container>DIV[empty=yes]")
        var maxIndex = emptyBoxes.length
        var selectedBoxIndex = Math.floor(Math.random() * maxIndex)
        emptyBoxes[selectedBoxIndex].setAttribute("marked","machine")
        emptyBoxes[selectedBoxIndex].setAttribute("empty","no")            
    }
    if (document.querySelectorAll("[empty=no]").length==9) endGame("tie")
    if (document.querySelectorAll("[empty=no]").length==8){
       setTimeout(function(){
           boxClick(document.querySelector("#container>DIV[empty=yes]"))
       },120)               
    }
}
function boxClick(box){
    if (box.getAttribute("empty") != "yes") return
    box.setAttribute("marked","player")
    box.setAttribute("empty","no")
    if (checkBoard("the player wins")){
        endGame("player")
        return
    }
    if (document.querySelectorAll("[empty=no]").length==9){
        endGame("tie")
        return
    }
    setTimeout(machineShift,120)
}  
function displayHelp(text){
    var help =  document.getElementById("help")
    help.innerHTML=text
    help.style.transition="0s"
    help.style.transform="scale(0)"
    help.style.filter="blur(4px)"
    help.style.color="green"
    setTimeout(function(){
        help.style.transition="transform .3s, filter .3s ease-out .4s, color .8s ease .6s"
        help.style.transform=""
        help.style.filter=""
        help.style.color=""
    },10)
}
   
   
document.body.addEventListener("click",function(){ 
    if (!boxClicked) return
    displayHelp("")
    if (gameInProgress) return
    initialize()
})
    
var container=document.getElementById("container")    
var counter =[0,0,0]
var boxClicked = false
var turn = "machine"
var gameInProgress = false;
for (i=0;i<9;i++){
    var div =document.createElement("div")        
    div.content = document.createElement("div")
    div.appendChild(div.content)
    container.appendChild(div)
    div.onclick= function(){
        boxClick(this)
        boxClicked = true
    }
}
initialize()
              
            
!
999px

Console