OK so I hopped in a game by myself just to check things out, can you explain the iconography a little bit? I'm guessing the symbols in the beginning are what you can communicate to your coop player, but I wasn't able to figure out how to use them. Also, the icon in your second screenshot (something -> box) - I also don't know what that means. Care to help nudge me in the right direction?
I really like the concept and aesthetic!