it may look like a folder here (or in vs code) but when you clone the app, run it from finder
if it still looks like a folder in finder you can create an issue reporting that here
this app is 250mb, you should be able to clone it and then look for it in finder and double click to open it
when the app opens you will be presented with the image that looks like the one below
Then you will create a nickname and click the set nickname button that should take about 1-2mins to load if you are on a stable network. like the image below
when it loads you will be presented with the image below.
here you can create room or join one and then when creating a server, you can input the name, while when joining a server, you will pick the server you want to join by the side (there could be none cause this could be empty so you wont really see any room), then after joining or creating a room you will be presented in the lobby option where you can select character.
and then only the room owner can see the button to join world and when you join the world you will be places in 3D metaverse, where you can see nfts and also talk with your friends.