src/routes/+page.svelte

<script lang="ts">
	// Svelte
	import { onMount } from "svelte";

	// Variables
	let displayGame: boolean = false;

	onMount(() => {
		displayGame = true;
	});
</script>

<h1>Welcome to SvelteKit</h1>
<p>
	Visit <a href="https://kit.svelte.dev">kit.svelte.dev</a> to read the documentation
</p>

{#if displayGame}
	<iframe
		src="game/index.html"
		frameborder="0"
		title="Spaceship Drift"
		height="512"
		width="512"
	/>
{/if}