JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = {
    settings: {},
    color: "#858789",
    cursor: "cursors/coin.png",
    height: 100,
    image1: "images/slide3.png",
    image2: "images/slide5.png",
    image3: "images/slide5.png",
    image4: "images/slide2.png",
    image5: "images/slide7.png",
    image6: "images/slide6.png",
    image7: "images/slide6.png",
    image8: "images/slide1.png",
    image9: "images/slide1.png",
    imageCover: "images/scratchimg2.gif",
    overlay: "none",
    realtimePercent: true,
    scratchDown: null,
    scratchMove: function (e, percent){},
    scratchUp: null,
    size: 10,
    width: 100 
}; 

function extractImages(obj){
    var imgArray = [], 
        num = 0; 
    for(var key in obj){
        num = parseInt(key.replace( /^\D+/g, ''), 10);  
        if(key.indexOf('image') > -1 && num > 0 && num < 10){
            imgArray.push(obj[key]); 
        }
    }
    return imgArray; 
}

alert(extractImages(obj));