Click on a room to speak with others there:

DnD Room 1 0 currently DnD Room 2 0 currently DnD Room 3 0 currently Total 0, including 0 here in the lobby

You will be asked to allow this app to use your microphone, which is the whole point.

When you get there, everything is drag and drop:

(You can also select an audio or image file by clicking your dot, without dragging.)

Beginning several seconds after you speak in a room, you can kick out anyone in that room. You get kicked back here to the lobby (where there is no speaking), and you can rejoin the room, but beware that people can kick you before you have a chance to disrupt.

This is all done in less about 600 lines of pure Javascript, with no frameworks, and is inspectable in this codepen.