spaceloop1/js/states/buy-ion-engine.js

states.push({
	id: "buy-ion-engine",
	button: "Buy Ion Engine (₩2000)",
	action: "Purchasing",
	show: () => !isFlagEnabled('ion-engine-purchased'),
	duration: 300,
	requires: () => {
		let enoughMoney = userData.money >= 2000;
		if (!enoughMoney) {
			errorMessage = "Not enough money to buy ion engine";
			return false;
		}
		let confirmPurchase = confirm(`Are you sure you want to purchase an ion engine for ₩2000?`);
		return confirmPurchase;
	},
	run: () => {
		userData.money -= 2000;
		setFlag('ion-engine-purchased');
	},
});