clicker.js

'use strict'
class Game{
	constructor(){
  	this.coins = 500;
    this.workers = [0,0];
		setInterval(()=>{this.tick();}, 1000);
  }
  updateWorkers(id){
  	this.workers[id]++;
  }
  tick(){
  	console.log(this.coins, this.workers);
  	this.coins += 1+this.workers[0]*3+this.workers[1]*15;
  }
}
class Shop {
	constructor() {
		this.avaiable = [{name: 'worker', production: 3, price: 5},{name: 'machine', production: 15, price: 50}];
	}
	buy(itemId){
		if(this.avaiable[itemId].price <= game.coins){
			game.workers[itemId]++;
			game.coins-=this.avaiable[itemId].price;
			return true;
		}else{
			console.log('not enough money');
			return;
		}
	}
}
var game = new Game();
var shop = new Shop();
shop.buy(0);
shop.buy(0);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);
shop.buy(1);