Embed into a site (no technical experience..)

I am looking to embed this game into a Notion.so page. Is this possible? Anyone who’s able to give me a step by step how to make this happen?

I assumed i could copy and paste the css into a “code” portion of notion, but that doesn’t seem to work. Also when I download the zip file and open the css as an example, a lot of it seems to be instructions vs what I need to copy and paste, so it’s possible I’m copying and pasting the wrong stuff?

Let me know. Thanks.