I was writing this proposal in Google Docs but the non-collaborative nature of Google Docs made me want to try using GitHub instead. You'll notice there's quite a few TODOs left in the proposal, I'll gladly accept any help in filling those out. Just make sure you add yourself among the contributors ;)
I started writing this proposal based on a Twemoji-styled variant of Mild Panic made by a friend, but Mild Panic’s original source is an Apple-style emoji made by Cassidy Williams: https://twitter.com/cassidoo/status/1129062070702419973
The deadline for Unicode v13.0 is long gone, so this emoji could at best make it into Unicode v14.0.
Proposal process: Submitting Emoji Proposals
Unicode Emoji Requests: Emoji Requests
List of proposal for Unicode 13.0: Emoji Proposals, v13.0