Some things I've found out while creating and testing this POC:
1) There is a degree of difficulty in configuring the CSS for the flow to appear decently on mobile.
2) LightningModal component and the dialog HTML tag didn't work in Lightning Out. I had to reimplement a modal dialog using HTML/CSS.
3) Flow screen actions didn't work in Lightning Out either. I had to replace them with LWCs.
Except for one Apex action and the LWCs, the flow is quite simple. Play, escape the jungle and the game will show buttons with an explanation of the flow at the end.
Tips: There are buttons for navigation and - where applicable - buttons for actions. If you refresh the page or leave and reopen, the game restarts (progress is not saved). There are 2 ways to win: a good way and a bad way. The items you collect along the way may have to be used in places where you've been before.