Application.ts has been created.

src/Modules/Application.ts

+import * as readlineSync from 'readline-sync';
+import {Deck} from "./Deck";
+import {Hand} from "./Hand";
+import {Checker} from "./Checker";
+
+export class Application {
+    private _hand: Hand = new Hand()
+    private _deck: Deck = new Deck()
+    startGame() {
+        console.log('==============================');
+        console.log('Let the Game begin!')
+        console.log('==============================\n\n');
+    let isEnd: boolean = true;
+        while (isEnd){
+            const answer = readlineSync.question(`
+    Choose one of the options:
+    1)  Shuffle the deck
+    2)  Take five cards${
+                this._hand.holdingCards.join()
+                    ?
+                    '\n    3)  Show my cards\n    4)  Change the cards\n    5)  Show my points'
+                    :
+                    ''
+            }
+    6)  Start new game
+    7)  End this game
+    `)
+            switch (answer) {
+                case '1':
+                    this._deck.shuffleDeck()
+                    break;
+                case'2':
+                    this.spreadOut5Cards()
+                    break;
+                case '3':
+                    this._hand.showCards();
+                    break;
+                case '4':
+                    this.changeTheCards()
+                    break;
+                case'5':
+                    this.checkPoints()
+                    break;
+                case'6':
+                    this._hand.holdingCards = [];
+                    break;
+                case'7':
+                    isEnd = false;
+                    break;
+                default:
+                    console.log("Choose correct option!")
+            }
+        }
+    }
+    spreadOut5Cards(){
+        for (let i = 1; i < 6; i++){
+            let cardFromDeck = this._deck.takeACardFromDeck();
+            if (cardFromDeck) this._hand.receiveCard(cardFromDeck);
+        }
+    }
+    changeTheCards(){
+        const answer = readlineSync.question("Choose which cards you want to change?")
+        const arrAnswer = Array.from(answer);
+        for (let i = 0; i < arrAnswer.length; i++) {
+            let cardFromDeck = this._deck.takeACardFromDeck();
+            if (cardFromDeck) this._hand.changeCard(cardFromDeck, parseInt(arrAnswer[i]));
+        }
+    }
+    checkPoints(){
+        const checker = new Checker(this._hand.holdingCards)
+        checker.checkCombination()
+    }
+}
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